Find the expectation of the number of heads in 15 tosses of a coin.

Find the expectation of the number of heads in 15 tosses of as coin.

Find the expectation of the number of tails in 15 tosses of a coin.

The value of expection of the number of heads in 15 tosses of a coin is (15)/(k) . The value of K will be

Find the probability distribution of X ,the number of heads in two tosses of a coin ( or a simultaneous toss of two coins).

Find the probability distribution of X ; the number of heads in two tosses of a coin ( or a simultaneous toss of two coins).