[algogeeks] probability

2012-09-07 Thread noname
[image: -]14Answers http://www.careercup.com/question?id=14553727

What is the probability of being the answer correct for this question, when 
the answer is chosen randomly:

a. 0.25
b. 0.60
c. 0.25
d. 0.50
 

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Re: [algogeeks] probability

2012-09-07 Thread rahul aravind
0.50


On Fri, Sep 7, 2012 at 6:05 PM, noname narayan.shiv...@gmail.com wrote:

 [image: -]14Answers http://www.careercup.com/question?id=14553727

 What is the probability of being the answer correct for this question,
 when the answer is chosen randomly:

 a. 0.25
 b. 0.60
 c. 0.25
 d. 0.50


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Re: [algogeeks] probability

2012-09-07 Thread rajat saxena
Hi,
The answer is=  (4C1/2C1)/4C1=1/2

On Fri, Sep 7, 2012 at 6:05 PM, noname narayan.shiv...@gmail.com wrote:

 [image: -]14Answers http://www.careercup.com/question?id=14553727

 What is the probability of being the answer correct for this question,
 when the answer is chosen randomly:

 a. 0.25
 b. 0.60
 c. 0.25
 d. 0.50


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[algogeeks] probability of winning with two cards

2012-01-18 Thread Sundi
there are 52 cards.. there are 3 players a1,a2,a3 each player is given
2 cards each one of A=2...J=11,Q=12,K=13..a user wins if his sum of
cards is greater then the other two players sum.

find the probability of a1 being the winner?

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Re: [algogeeks] probability of winning with two cards

2012-01-18 Thread sunny agrawal
isn't the answer will be 1/3, without any calculations :)

On Thu, Jan 19, 2012 at 7:10 AM, Sundi sundi...@gmail.com wrote:

 there are 52 cards.. there are 3 players a1,a2,a3 each player is given
 2 cards each one of A=2...J=11,Q=12,K=13..a user wins if his sum of
 cards is greater then the other two players sum.

 find the probability of a1 being the winner?

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Indian Institute Of Technology,Roorkee

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Re: [algogeeks] probability of winning with two cards

2012-01-18 Thread Prateek Jain
ya obviously...it is 1/3.no need of any data is required

On 1/18/12, sunny agrawal sunny816.i...@gmail.com wrote:
 isn't the answer will be 1/3, without any calculations :)

 On Thu, Jan 19, 2012 at 7:10 AM, Sundi sundi...@gmail.com wrote:

 there are 52 cards.. there are 3 players a1,a2,a3 each player is given
 2 cards each one of A=2...J=11,Q=12,K=13..a user wins if his sum of
 cards is greater then the other two players sum.

 find the probability of a1 being the winner?

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[algogeeks] probability question

2011-08-31 Thread swetha rahul
In a railway station, there are two trains going. One in the harbour line
and one in the main line, each having a frequency of 10 minutes. The main
line service starts at 5 o'clock and the harbour line starts at 5.02A.M. A
man goes to the station every day to catch the first train that comes.What
is the probability of the man catching the first
train?

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Re: [algogeeks] probability question

2011-08-31 Thread Sri Harsha
0.8 is correct. the man will be on the 1st train if he reaches the station
after the 2nd leaves and before 1st arrives. and the probability of this
happening is 8/10.

On Wed, Aug 31, 2011 at 7:07 PM, swetha rahul swetharahu...@gmail.comwrote:

 In a railway station, there are two trains going. One in the harbour line
 and one in the main line, each having a frequency of 10 minutes. The main
 line service starts at 5 o'clock and the harbour line starts at 5.02A.M. A
 man goes to the station every day to catch the first train that comes.What
 is the probability of the man catching the first
 train?





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[algogeeks] Probability Q(Mean nd Variance)

2011-08-29 Thread Vijay Khandar
Let X and Y be jointly distributed random variables such that the
conditional distribution of Y,
given X=x, is uniform on the interval (x-1,x+1). Suppose E(X)=1 and
Var(X)=5/3.

Q.1 The mean of the random variable Y is
First question using common data:
(A) 1/2(B) 1(C) 3/2   (D) 2

Q.2 The variance of the random variable Y is
Second question using common data:
(A) 1/2(B) 2/3  (C) 1 (D) 2

Plz anyone provide correct answer with explanation

Vijay..

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[algogeeks] Probability

2011-08-29 Thread Naman Mahor
An anti aircraft gun can fire four shots at a time. If the probabilities of
the first, second, third and the last shot hitting the enemy aircraft are
0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread vishwa
is it 0.55...

On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav
algowithabhis...@gmail.comwrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??


 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread Naman Mahor
ur answer is correct but i hv a confusion that all four shots fire at a time
so there may be probability that all shots hits the craft. but ur assuming
that first hit + first not hit * second hit+..
plz clear my confustion

On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav
algowithabhis...@gmail.comwrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??

 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread Naman Mahor
i hv googled it and the answer is like
The enemy aircraft will be brought down even if one of the four shots hits
the aircraft.

The opposite of this situation is that none of the four shots hit the
aircraft.

The probability that none of the four shots hit the aircraft is given by
(1-0.7)(1-0.6)(1-0.5)(1-0.4) = 0.3*0.4*0.5*0.6 = 0.036

So, the probability that at least one of the four hits the aircraft = 1 –
0.036 = 0.964.

On Mon, Aug 29, 2011 at 5:54 PM, vishwa vishwavam...@gmail.com wrote:

 is it 0.55...


 On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??


 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread Sanjay Rajpal
It should be 1 - no one hits, i.e. 1 - 0.3*0.6*0.5*0.6 = 1 - 0.0540=0.9460.

Correct me if m wrong..


Sanju
:)



On Mon, Aug 29, 2011 at 5:19 AM, Abhishek Yadav
algowithabhis...@gmail.comwrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??


 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread Dheeraj Sharma
i was abt to write it :)
but u googled it :D

On Mon, Aug 29, 2011 at 5:57 PM, Naman Mahor naman.ma...@gmail.com wrote:

 i hv googled it and the answer is like
 The enemy aircraft will be brought down even if one of the four shots hits
 the aircraft.

 The opposite of this situation is that none of the four shots hit the
 aircraft.

 The probability that none of the four shots hit the aircraft is given by
 (1-0.7)(1-0.6)(1-0.5)(1-0.4) = 0.3*0.4*0.5*0.6 = 0.036

 So, the probability that at least one of the four hits the aircraft = 1 –
 0.036 = 0.964.


 On Mon, Aug 29, 2011 at 5:54 PM, vishwa vishwavam...@gmail.com wrote:

 is it 0.55...


 On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??


 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft 
 are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread Dheeraj Sharma
u mean to say .964 and not .946..isnt it?

On Mon, Aug 29, 2011 at 5:58 PM, Sanjay Rajpal srn...@gmail.com wrote:

 It should be 1 - no one hits, i.e. 1 - 0.3*0.6*0.5*0.6 = 1 - 0.0540=0.9460.

 Correct me if m wrong..


 Sanju
 :)



 On Mon, Aug 29, 2011 at 5:19 AM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??


 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread vishwa
@naman: whose answer man


On Mon, Aug 29, 2011 at 5:56 PM, Naman Mahor naman.ma...@gmail.com wrote:

 ur answer is correct but i hv a confusion that all four shots fire at a
 time so there may be probability that all shots hits the craft. but ur
 assuming that first hit + first not hit * second hit+..
 plz clear my confustion

 On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??

 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread Naman Mahor
abhishek's answer.
plz  clear my confusion
that i hv mentioned above.
On Mon, Aug 29, 2011 at 6:04 PM, vishwa vishwavam...@gmail.com wrote:

 @naman: whose answer man


 On Mon, Aug 29, 2011 at 5:56 PM, Naman Mahor naman.ma...@gmail.comwrote:

 ur answer is correct but i hv a confusion that all four shots fire at a
 time so there may be probability that all shots hits the craft. but ur
 assuming that first hit + first not hit * second hit+..
 plz clear my confustion

 On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??

 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the probabilities
 of the first, second, third and the last shot hitting the enemy aircraft 
 are
 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an
 enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread vishwa
if first is hit then the probability will be 0.7he missed 1st chance ,,
probability with which he missed is 0.3 ... same way he will try 2nd
chance.. hit chance is 0.6.. but he missed first already.. so total
probabilty of hit is 0.3*0.6... its the same way for all.




On Mon, Aug 29, 2011 at 6:06 PM, Naman Mahor naman.ma...@gmail.com wrote:

 abhishek's answer.
 plz  clear my confusion
 that i hv mentioned above.

 On Mon, Aug 29, 2011 at 6:04 PM, vishwa vishwavam...@gmail.com wrote:

 @naman: whose answer man


 On Mon, Aug 29, 2011 at 5:56 PM, Naman Mahor naman.ma...@gmail.comwrote:

 ur answer is correct but i hv a confusion that all four shots fire at a
 time so there may be probability that all shots hits the craft. but ur
 assuming that first hit + first not hit * second hit+..
 plz clear my confustion

 On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4
 =.964.correct me if i am wrong.??

 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the
 probabilities of the first, second, third and the last shot hitting the
 enemy aircraft are 0.7, 0.6, 0.5 and 0.4, what is the probability that 
 four
 shots aimed at an enemy aircraft will bring the aircraft down?

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Re: [algogeeks] Probability

2011-08-29 Thread tech coder
yes .964 easy hai yaar

On Mon, Aug 29, 2011 at 5:47 AM, vishwa vishwavam...@gmail.com wrote:

 if first is hit then the probability will be 0.7he missed 1st chance ,,
 probability with which he missed is 0.3 ... same way he will try 2nd
 chance.. hit chance is 0.6.. but he missed first already.. so total
 probabilty of hit is 0.3*0.6... its the same way for all.




 On Mon, Aug 29, 2011 at 6:06 PM, Naman Mahor naman.ma...@gmail.comwrote:

 abhishek's answer.
 plz  clear my confusion
 that i hv mentioned above.

 On Mon, Aug 29, 2011 at 6:04 PM, vishwa vishwavam...@gmail.com wrote:

 @naman: whose answer man


 On Mon, Aug 29, 2011 at 5:56 PM, Naman Mahor naman.ma...@gmail.comwrote:

 ur answer is correct but i hv a confusion that all four shots fire at a
 time so there may be probability that all shots hits the craft. but ur
 assuming that first hit + first not hit * second hit+..
 plz clear my confustion

 On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav 
 algowithabhis...@gmail.com wrote:

 i guess it would be    0.7 + 0.3*0.6 + 0.3*0.4*0.5
 + 0.3*0.4*0.5*0.4 =.964.correct me if i am wrong.??

 On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor naman.ma...@gmail.comwrote:

 An anti aircraft gun can fire four shots at a time. If the
 probabilities of the first, second, third and the last shot hitting the
 enemy aircraft are 0.7, 0.6, 0.5 and 0.4, what is the probability that 
 four
 shots aimed at an enemy aircraft will bring the aircraft down?

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[algogeeks] probability ques

2011-08-23 Thread ramya reddy
Let 'a' be  a number between 1 and 100. what is the probability of choosing
'a' such that a+ (100/a) 50

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Re: [algogeeks] probability ques

2011-08-23 Thread aayush jain
@priya  give the logic

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Re: [algogeeks] probability ques

2011-08-23 Thread Vipin Vishvkarma
range of 'a' will be [3,47]
so in this way 45/98

On Tue, Aug 23, 2011 at 10:36 PM, aayush jain ajain...@gmail.com wrote:

 @priya  give the logic

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Re: [algogeeks] probability ques

2011-08-23 Thread priya ramesh
try substituting values for a.
for a=1, 2 it's  50
for a=3, 4, 5, 6, 7... it's less than 50
when a approaches 48, 49... it's  50
the max value of a that satisfies the condition is 47.

p= total numbers between 3 and 47 (inclusive of 3 and 47)
/
 total numbers between 1 and 100

= 45/98

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Re: [algogeeks] probability ques

2011-08-23 Thread Manoj Bagari
possible value for a can be 1,2,48,49,50 and all (50-100]
no.

so prob will be 55/100
On Tue, Aug 23, 2011 at 10:41 PM, priya ramesh 
love.for.programm...@gmail.com wrote:

 try substituting values for a.
 for a=1, 2 it's  50
 for a=3, 4, 5, 6, 7... it's less than 50
 when a approaches 48, 49... it's  50
 the max value of a that satisfies the condition is 47.

 p= total numbers between 3 and 47 (inclusive of 3 and 47)
 /
  total numbers between 1 and 100

 = 45/98

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Re: [algogeeks] probability ques

2011-08-23 Thread Manoj Bagari
oh sorry i thought it was a+100/a50 because this same question asked by
national instrument 2 day ago.
in this case  passibe cases wil be  44 [3-47} no so it'll be 44/100

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Re: [algogeeks] probability ques

2011-08-23 Thread Dheeraj Sharma
y its 45/98 and not 45/100 ??

On Wed, Aug 24, 2011 at 9:41 AM, Manoj Bagari manojbag...@gmail.com wrote:

 oh sorry i thought it was a+100/a50 because this same question asked by
 national instrument 2 day ago.
 in this case  passibe cases wil be  44 [3-47} no so it'll be 44/100

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[algogeeks] probability

2011-08-20 Thread Naman Mahor
let's say A keep tossing a fair coin, until he get 2 consecutive heads,
define X to be the number of tosses for this process; B keep tossing another
fair coin, until he get 3 consecutive heads, define Y to be the number of
the tosses for this process.Calculate P{XY}

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[algogeeks] probability! tough one to crack!

2011-08-19 Thread priya ramesh
A 1 inch diameter coin is thrown on a table covered with a grid of lines two
inches apart. What is the probability the coin lands in a square without
touching any of the lines of the grid?

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Re: [algogeeks] probability! tough one to crack!

2011-08-19 Thread vaibhav shukla
area of coin = pie * 1^2 = n(e)
area of square= 2^2 * 4(as there are four such squares)= n(S)

probablility = n(E)/n(S) = pie/16 . the ans ;)


On Fri, Aug 19, 2011 at 10:20 PM, priya ramesh 
love.for.programm...@gmail.com wrote:

 A 1 inch diameter coin is thrown on a table covered with a grid of lines
 two inches apart. What is the probability the coin lands in a square without
 touching any of the lines of the grid?

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[algogeeks] probability tough one!

2011-08-17 Thread priya ramesh
what is the probability of having b'days of 2 persons on the same day in a
gathering of 50 persons?

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Re: [algogeeks] probability tough one!

2011-08-17 Thread aditya kumar
no of days in a year shud be 365 or 366 ??

On Wed, Aug 17, 2011 at 5:49 PM, priya ramesh 
love.for.programm...@gmail.com wrote:

 what is the probability of having b'days of 2 persons on the same day in a
 gathering of 50 persons?

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Re: [algogeeks] probability tough one!

2011-08-17 Thread priya ramesh
nothing is specified. I guess it's 365

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[algogeeks] Probability

2011-08-11 Thread Mani Bharathi
Two person each make a single throw with a pair of dice. The probability 
that the sum of numbers if the dice of their throws are unequal is 
A. 575/648  B. 273/432  c. 264/816.

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Re: [algogeeks] Probability question.. help

2011-08-10 Thread programming love
is it 101/200??

On Wed, Aug 10, 2011 at 3:41 AM, Prakash D cegprak...@gmail.com wrote:

 is there anything like there should be atleast one man and one women should
 dance together?


 On Wed, Aug 10, 2011 at 2:26 AM, Shuaib Khan aries.shu...@gmail.comwrote:



 On Wed, Aug 10, 2011 at 1:45 AM, Brijesh Upadhyay 
 brijeshupadhyay...@gmail.com wrote:

 No thers is not.. someone has asked me this., dont know anything else
 about the question  :|


 Seems like you got half of the question there.


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Re: [algogeeks] Probability question.. help

2011-08-10 Thread Aditya Virmani
is it 100 men  100 women?

On Wed, Aug 10, 2011 at 3:25 PM, programming love 
love.for.programm...@gmail.com wrote:

 is it 101/200??


 On Wed, Aug 10, 2011 at 3:41 AM, Prakash D cegprak...@gmail.com wrote:

 is there anything like there should be atleast one man and one women
 should dance together?


 On Wed, Aug 10, 2011 at 2:26 AM, Shuaib Khan aries.shu...@gmail.comwrote:



 On Wed, Aug 10, 2011 at 1:45 AM, Brijesh Upadhyay 
 brijeshupadhyay...@gmail.com wrote:

 No thers is not.. someone has asked me this., dont know anything else
 about the question  :|


 Seems like you got half of the question there.


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[algogeeks] probability!-need help

2011-08-09 Thread programming love
Please send a link where i can find hard permutations and combinations and
probability questions. Please help. If you guys have good e books or
materials for apti questions, please mail me. Thanks in advance.

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[algogeeks] Probability question.. help

2011-08-09 Thread Brijesh Upadhyay
100 men  women dance with each other. What is the Probability that a
man cannot dance with more than two women?

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Re: [algogeeks] Probability question.. help

2011-08-09 Thread Prakash D
is there any constraint for anyone to dance?

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Re: [algogeeks] Probability question.. help

2011-08-09 Thread Brijesh Upadhyay
No thers is not.. someone has asked me this., dont know anything else about 
the question  :|

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Re: [algogeeks] Probability question.. help

2011-08-09 Thread Shuaib Khan
On Wed, Aug 10, 2011 at 1:45 AM, Brijesh Upadhyay 
brijeshupadhyay...@gmail.com wrote:

 No thers is not.. someone has asked me this., dont know anything else about
 the question  :|


Seems like you got half of the question there.


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Re: [algogeeks] Probability question.. help

2011-08-09 Thread Prakash D
is there anything like there should be atleast one man and one women should
dance together?


On Wed, Aug 10, 2011 at 2:26 AM, Shuaib Khan aries.shu...@gmail.com wrote:



 On Wed, Aug 10, 2011 at 1:45 AM, Brijesh Upadhyay 
 brijeshupadhyay...@gmail.com wrote:

 No thers is not.. someone has asked me this., dont know anything else
 about the question  :|


 Seems like you got half of the question there.


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[algogeeks] Probability

2011-08-08 Thread programming love
Hello guys! Please suggest good books to learn probability, Permutations 
combinations.
 Any tips and tricks or methods regarding the ways in which the problems can
be solved will help.
Plz reply and help me with this.

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[algogeeks] Probability Puzzle

2011-08-07 Thread Algo Lover
A bag contains 5 coins. Four of them are fair and one has heads on
both sides. You randomly pulled one coin from the bag and tossed it 5
times, heads turned up all five times. What is the probability that
you toss next time, heads turns up. (All this time you don't know you
were tossing a fair coin or not).

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Re: [algogeeks] Probability Puzzle

2011-08-07 Thread ankit sambyal
17/80




On Sun, Aug 7, 2011 at 10:34 AM, Algo Lover algolear...@gmail.com wrote:

 A bag contains 5 coins. Four of them are fair and one has heads on
 both sides. You randomly pulled one coin from the bag and tossed it 5
 times, heads turned up all five times. What is the probability that
 you toss next time, heads turns up. (All this time you don't know you
 were tossing a fair coin or not).

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Re: [algogeeks] Probability Puzzle

2011-08-07 Thread Nitish Garg
Should be (4/5 *(1/2)^6) + (1/5 * 1) = 17/80

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Re: [algogeeks] probability

2011-01-14 Thread Wei.QI
x is even number probability
0.9x + x = 1
x = 1/1.9
P(2) = P(4) = P(6) = (1 / 1.9) / 3

P(4|5|6) = (P(4) + P(6)) / 0.75 = 2 / 1.9 / 3 / 0.75 = 0.4678362573099415
-weiq
On Thu, Jan 13, 2011 at 11:29 PM, snehal jain learner@gmail.com wrote:

 An unbalanced dice (with 6 faces, numbered from 1 to 6) is thrown. The
 probability that the face value is odd is 90% of the probability that
 the face value
 is even. The probability of getting any even numbered face is the
 same.
 If the probability that the face is even given that it is greater than
 3 is 0.75,
 which one of the following options is closest to the probability that
 the face value
 exceeds 3?
 (A) 0.453 (B) 0.468 (C) 0.485 (D) 0.492

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[algogeeks] probability

2011-01-13 Thread snehal jain
An unbalanced dice (with 6 faces, numbered from 1 to 6) is thrown. The
probability that the face value is odd is 90% of the probability that
the face value
is even. The probability of getting any even numbered face is the
same.
If the probability that the face is even given that it is greater than
3 is 0.75,
which one of the following options is closest to the probability that
the face value
exceeds 3?
(A) 0.453 (B) 0.468 (C) 0.485 (D) 0.492

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Re: [algogeeks] probability

2011-01-01 Thread RAHUL KUJUR
Suppose three gunmen are A, B, and C who have a probability of 100%, 50% and
33% respectively. The shooting will start from C, then B and at last A.
Now there are several possibilities for C. If C shoots B, then A would shoot
C with an accuracy of 100% or in other case if C shoots A, then B would
shoot him with an accuracy of 50%. So he has a probability of getting
killed. We can see in either of the cases C will die.
So what C will do in first round is that it will fire the shot in air. Now
the scenario gets interesting. By doing this C has turned the battle among
three people into two people A and B. This will increase the chances of
survival of C. So now its B's turn of firing. So he can fire at either A or
C. If B fires at C, then A will shoot B with an accuracy of 100% and B knows
that he will surely die so B won't do that. If B shoots A, then C will shoot
B.
I think this is the solution. Please point out if there are any loopholes.

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Re: [algogeeks] probability

2011-01-01 Thread Salil Joshi
hahaha... lol... shoot in air ... lamo :-))



On Sat, Jan 1, 2011 at 6:28 PM, RAHUL KUJUR kujurismonu2...@gmail.comwrote:

 Suppose three gunmen are A, B, and C who have a probability of 100%, 50%
 and 33% respectively. The shooting will start from C, then B and at last A.
 Now there are several possibilities for C. If C shoots B, then A would
 shoot C with an accuracy of 100% or in other case if C shoots A, then B
 would shoot him with an accuracy of 50%. So he has a probability of getting
 killed. We can see in either of the cases C will die.
 So what C will do in first round is that it will fire the shot in air. Now
 the scenario gets interesting. By doing this C has turned the battle among
 three people into two people A and B. This will increase the chances of
 survival of C. So now its B's turn of firing. So he can fire at either A or
 C. If B fires at C, then A will shoot B with an accuracy of 100% and B knows
 that he will surely die so B won't do that. If B shoots A, then C will shoot
 B.
 I think this is the solution. Please point out if there are any loopholes.


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+91.9819.442.865


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[algogeeks] probability

2010-12-21 Thread snehal jain
You are in duel with two other gunmen. First guy shoot with 100%
accuracy, second person shoot with 50% accuracy and you shoot with 33%
accuracy. Everyone will get a chance to shoot in every round and
shooting will start from the guy with worst accuracy. What will you
shoot in first round?

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[algogeeks] Probability of a phrase in a text document?

2007-12-03 Thread Abhishek

Hi,
If I have a large corpus of text documents and I need to find the
probability of occurence of a phrase like I am in the given set of
text documents, how do I go about finding  the value?
I can very well search how many time does the phrase I am occurs in
the whole set of text documents including all the sentences, but what
do i divide the count by?
Thanks

With Regards,
Abhishek S

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