Three balance coins are tossed simultaneoulsy. If X denotes the number of heads, find probaility distribution of X.

A coin is tossed 4 times . If x is the number of heads observed , find the probability distribution of X.

A coin is tossed 5 xx.If X is the number of heads observed,fid the probability distribution of X.

A coin is tossed 4 times. Let X denote the number of heads. Find the probability distribution of X. Also, find the mean and variance of X.

Two coins are tossed simultaneously. Then, the value of E(X), where X denotes the number of heads is

A fair coin is tossed four xx.Let X denote the number of heads occurring.Find the probability distribution,mean and variance of X.

(a) (i) Find the probability distribution of the number of heads when three coins are tossed simultaneously. (ii) Find the probability distribution of the number of tails in the simultaneous tosses of three coins. (iii) Find the probability distribution of the number of heads in the simultaneous toss of four coins. (b) (i) Find the probability distribution of the number of heads in three tosses of a coin. (ii) Find the probability distribution of the number of sixes in two tosses of a die. ( c ) Find the probability distribution of the number of heads (tails) in four tosses of a coin.

A fair coin is tossed 4 times. If X denotes the number of heads obtained, then the formula for p.m.f. of X is

three fair coins are tossed simultaneously . Find the propability of getting two heads .