@shady: 3/5 can be the answer to such a question: what is prob of getting head on nth toss if we have 4 coins fair and one biased...then at nth toss u choose 4/5 1/5 prob and then u get 3/5
@shady , don: i did this: P( 6th head | 5 heads occured)= P( 6 heads )/ P( 5 heads) answr u get is 17/18..i cud be wrong please correct if so On Mon, Aug 8, 2011 at 10:45 PM, shady <[email protected]> wrote: > answer is 3/5. 17/80 is the answer for 6 consecutive heads. > > > On Tue, Aug 9, 2011 at 2:07 AM, Don <[email protected]> wrote: > >> Consider the 5 * 64 possible outcomes for the selection of coin and >> six flips, each one happening with equal probability. Of those 320 >> possible outcomes, 4*62 are excluded by knowing that the first 5 flips >> are heads. That leaves 64 outcomes with the rigged coin and 2 outcomes >> with each of the fair coins, for a total of 72 outcomes. 68 of those >> are heads, so the answer to the puzzle is 68 of 72, or 17 of 18. >> Don >> >> On Aug 8, 2:36 am, Shachindra A C <[email protected]> wrote: >> > @brijesh >> > >> > *first five times* is mentioned intentionally to mislead i think. I vote >> for >> > 3/5. Moreover, 17/80 doesn't make sense also. Plz correct me if I am >> wrong. >> > >> > >> > >> > On Mon, Aug 8, 2011 at 12:06 PM, sumit gaur <[email protected]> >> wrote: >> > > (3/5) >> > >> > > 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, >> > Shachindra A C >> >> -- >> 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. > -- "People often say that motivation doesn't last. Well, neither does bathing - that's why we recommend it daily." -- 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.
