The expected value of the number of heads obtained when three coins are tossed simultaneously is .....

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 heads when two coins are tossed simultaneously.

List the possible out comes 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 probability distribution of the number of tails when three coins are tossed simultaneously.

Find the probalility of at least one head when two coins are tossed simultaneously .

If getting a head on a coin when it is tossed is considered as success, then the probability of having more number of failures when ten fair coins are tossed simultaneously, is