i think the answer will be 1/5+ 4/5*1/2=3/5 coz the question is saying what is the probability of getting head* sixth time*(when 5 heads were already there)..
it is not saying what is the probability of getting heads* 6 times*..(in this case answer will be 17/180) On Mon, Aug 8, 2011 at 9:54 AM, D.B. <sylve...@gmail.com> wrote: > 1/5+1/2^6 > > On Aug 7, 8:34 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, Kamakshi kamakshi...@gmail.com -- 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.