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.

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

A coin is tossed 4 times. X is the number of heads observed. Find the probability distribution of X .

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

A coin is tossed 5 times. If X is the number of heads observed, find the probability 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 times . X is the number of heads of observed . Find the probability distribution of X .

A fair coin is tossed 4 times.Let X denotes the number of heads obtained.Write down the probability distribution of X.Also find the formula for pmf of X.

Three numbers are selected at random (without replacement) from first 6 positive integers. Let X denote the largest of the three numbers obtained. Find the probability distribution of X. Also, find the mean and variance of the distribution.

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