A coin is tossed until a head appears or the tail appears 4 times in succession. Find the probability distribution of the number of tosses.

A coin is tossed until a head qappears or the tail appears 4 rxx in succession.Find the probability distribution of the number of tosses.

A coin is tossed until a head appears or tail appears 4 times in succession. Find the probability getting a head it is known that tail occured at least twice .

A coin is tossed 3 times. Find the probability distribution of the number of heads.

(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 coin is tossed until a head appears. What is the expectation of the number of tosses required ?

A coin is tossed until a head appears. What is the expectation of the number of tosses required ?

A coin is tossed so that the head is 3 times as likely to occur as tail. If the coin is tossed twice, Find the probability distribution of number of tails.

A biased coin is tossed repeatedly until a tail appears for the first time. The head is 3 times likely to appear as the tail. The probability that the number of tosses required will be more than 4, given that in first two toss no tail has occur, is