# Statistic probability

1. John has a choice between two options, to play 3 tennis sets with his father (F) and Bill (B), atennis champion. He can either play in the order F-B-F, or in the order B-F-B. Bill is a better playerthan his father. If John wins two sets in a row, he will win a prize.(a) Which order should John choose? Why?(b) Let Z be the number of times John wins. If, instead, John wanted to maximize E[Z], shouldhe make a different choice? Why or why not?2. Suppose X is a binomial random variable with parameters n and p. (i.e., there are n trials). SupposeY is a binomial random variable with parameters n and q. Suppose also that 0 p < q 1. Trueor false?: P(X k) P(Y k), for any k. If true, provide a proof. If not true, provide acounterexample. (Hint: if youre having trouble, simplify by considering small n.)