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 <[email protected]>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 <[email protected]> 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 <[email protected]> > 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 <[email protected]> wrote: > > > > sry...its wrong > > > > > > On Aug 7, 10:34 pm, Algo Lover <[email protected]> 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 [email protected]. > > > To unsubscribe from this group, send email to > > > [email protected]. > > > 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 [email protected]. > To unsubscribe from this group, send email to > [email protected]. > 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
