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 Probability/ Student, Donald Duck Options
Sheldon
 #1 Posted : Monday, January 30, 2012 2:53:25 PM
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Joined: 1/30/2012
Posts: 1

Hi to all!
I don`t know to do this problems (they are from my last exam), so I would much apriciate if someone can help

1) Student needs to answer on n independent questions (n is even). Probability that he`ll give the correct answer is P1 for first n/2 questions, and P2 is probability that he`ll give the correct answer for the following questions (n/2)Z is total number of correct answers. Determine the distribution of random variable Z.

2) Donald Duck had hidden \$100 bill in one of three books that he currently reads, but he forgot in which one.Pi is the probability that he will find the bill by quickly browsing the i-th book (i = 1,2,3) if the bill really is in that book (it is possible Pi <1).Let`s suppose that Donald Duck quickly browsed through the book and didn`t found the bill. What is the probability that bill really is in that book?

Desperately need help

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