@Shuaib: **What is the probability that you toss *next time, heads turns up ***. Aseem
On Mon, Aug 8, 2011 at 1:19 AM, Shuaib Khan <aries.shu...@gmail.com> wrote: > > > On Mon, Aug 8, 2011 at 12:47 AM, aseem garg <ase.as...@gmail.com> wrote: > >> Think it like this. I have tossed a coin 5 times and it showed heads all >> the times. What is the probabilty of it shoing a HEADS now? >> Aseem >> > > Well you are thinking about it the wrong way. Question asks that what is > the probability that heads will show up the first five times, plus a sixth > time. Not just the sixth time. The first five times head showing up is part > of the question. > > > >> >> >> >> On Mon, Aug 8, 2011 at 1:12 AM, Shuaib Khan <aries.shu...@gmail.com>wrote: >> >>> >>> >>> On Mon, Aug 8, 2011 at 12:40 AM, Puneet Gautam >>> <puneet.nsi...@gmail.com>wrote: >>> >>>> Sixth toss is independent of previous tosses and dependent only on >>>> coin selection...! >>>> >>>> 1/5 + 4/5(1/2)= 3/5 >>>> >>>> is the correct answer.... >>>> >>>> we want to calc. probability of getting heads the sixth time only.... >>>> even if it would have been 100 th time...3/5 would be the answer >>>> only.. >>>> >>>> >>> It is not independent. Re read the question. The first five times, it HAS >>> to be heads. >>> >>>> >>>> On 8/8/11, Prakash D <cegprak...@gmail.com> wrote: >>>> > 1.) coin is fair >>>> > 2.) coin is unfair >>>> > >>>> > P(head) for unfair coin= 1/5 * 1= 1/5 >>>> > P(head) for fair coin= 4/5* 1/2 = 2/5 >>>> > >>>> > >>>> > the probability at any instant that the tossed coin is a head is 3/5 >>>> > >>>> > 17/80 is the probability to get head at all the six times. >>>> > >>>> > the soln. for this problem will be 3/5 >>>> > >>>> > On Mon, Aug 8, 2011 at 12:45 AM, aseem garg <ase.as...@gmail.com> >>>> wrote: >>>> > >>>> >> If the coin is unbiased then probability of heads: 1/2 irrespective >>>> of >>>> >> whether it is first time or nth time. So answer should be 3/5. >>>> >> Aseem >>>> >> >>>> >> >>>> >> >>>> >> On Mon, Aug 8, 2011 at 12:39 AM, saurabh chhabra >>>> >> <saurabh131...@gmail.com>wrote: >>>> >> >>>> >>> Even u dont get why u people are gettin 17/80...the probability that >>>> >>> it will be a head 6th time will be same as the frst time...so it >>>> shud >>>> >>> be 3/5... >>>> >>> >>>> >>> On Aug 7, 11:05 pm, Kunal Yadav <kunalyada...@gmail.com> wrote: >>>> >>> > @algo: We can get head in two cases:- >>>> >>> > >>>> >>> > 1.) coin is biases >>>> >>> > 2.) coin is not biased >>>> >>> > >>>> >>> > P(head) for biased= 1/5 *1*1*1*1*1*1= 1/5 >>>> >>> > P(head) for unbiased= 4/5*(1/2)^6 >>>> >>> > hence combined probability is what nitish has already mentioned. >>>> Hope >>>> >>> you >>>> >>> > get the point. >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > >>>> >>> > On Sun, Aug 7, 2011 at 11:29 PM, Algo Lover < >>>> algolear...@gmail.com> >>>> >>> wrote: >>>> >>> > > Can anyone explain the approach how to solve this . >>>> >>> > > I think all tosses are independent so it should be 3/5. why is >>>> this >>>> >>> in- >>>> >>> > > correct >>>> >>> > >>>> >>> > > On Aug 7, 10:55 pm, saurabh chhabra <saurabh131...@gmail.com> >>>> wrote: >>>> >>> > > > sry...its wrong >>>> >>> > >>>> >>> > > > On Aug 7, 10:34 pm, 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). >>>> >>> > >>>> >>> > > -- >>>> >>> > > You received this message because you are subscribed to the >>>> Google >>>> >>> Groups >>>> >>> > > "Algorithm Geeks" group. >>>> >>> > > To post to this group, send email to algogeeks@googlegroups.com >>>> . >>>> >>> > > To unsubscribe from this group, send email to >>>> >>> > > algogeeks+unsubscr...@googlegroups.com. >>>> >>> > > For more options, visit this group at >>>> >>> > >http://groups.google.com/group/algogeeks?hl=en. >>>> >>> > >>>> >>> > -- >>>> >>> > Regards >>>> >>> > Kunal Yadav >>>> >>> > (http://algoritmus.in/) >>>> >>> >>>> >>> -- >>>> >>> You received this message because you are subscribed to the Google >>>> Groups >>>> >>> "Algorithm Geeks" group. >>>> >>> To post to this group, send email to algogeeks@googlegroups.com. >>>> >>> To unsubscribe from this group, send email to >>>> >>> algogeeks+unsubscr...@googlegroups.com. >>>> >>> For more options, visit this group at >>>> >>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>> >>>> >>> >>>> >> -- >>>> >> You received this message because you are subscribed to the Google >>>> Groups >>>> >> "Algorithm Geeks" group. >>>> >> To post to this group, send email to algogeeks@googlegroups.com. >>>> >> To unsubscribe from this group, send email to >>>> >> algogeeks+unsubscr...@googlegroups.com. >>>> >> For more options, visit this group at >>>> >> http://groups.google.com/group/algogeeks?hl=en. >>>> >> >>>> > >>>> > -- >>>> > You received this message because you are subscribed to the Google >>>> Groups >>>> > "Algorithm Geeks" group. >>>> > To post to this group, send email to algogeeks@googlegroups.com. >>>> > To unsubscribe from this group, send email to >>>> > algogeeks+unsubscr...@googlegroups.com. >>>> > For more options, visit this group at >>>> > http://groups.google.com/group/algogeeks?hl=en. >>>> > >>>> > >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Algorithm Geeks" group. >>>> To post to this group, send email to algogeeks@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> algogeeks+unsubscr...@googlegroups.com. >>>> For more options, visit this group at >>>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>>> >>> >>> >>> -- >>> Shuaib >>> http://www.bytehood.com >>> http://twitter.com/ShuaibKhan >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to algogeeks@googlegroups.com. >>> To unsubscribe from this group, send email to >>> algogeeks+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algogeeks@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > Shuaib > http://www.bytehood.com > http://twitter.com/ShuaibKhan > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. 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