Answer to Question #16031 in Statistics and Probability for Vlatko

Question

Consider the experiment of tossing a coin. Heads appear about once out of every four tosses. Consider r.v X the number of heads obtained if this experiment is repeated five tosses.
(a) Find pmf and cdf of the r.v .
(b) Find the probability of the event that that heads appear exactly twice.
a) Find the mean and variance of the r.v .

Thanks a lot!