[" How mean and varbance of the number of tails when three coins are "],[" simultancomily."]

Find the mean and variance of the number of tails when three coins are tossed simultaneously.

Find the mean and variance of the number of tails on the throw of three coins.

Find the probability distribution of the number of tails when three coins are tossed simultaneously.

(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.

Find the mean, variance and standard deviation of the number heads when three coins are tossed.

Find the probability distribution of the number of tails when two coins are tossed.

Find the mean, variance and standard deviation of the number of tails in two tosses of a coin.

Find the probability distribution of the number of heads when three coins are tossed. Also find the mean number of heads in the above case.

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