A balanced coin is tossed repeatedly until a tail appears if x denotes the number of heads preceding the first tail find the probability distribution of x

Let x denote the number of heads when 10 unbiased coins are tossed find the probability distribution of x

Let x denote the number of tails preceding the first head when an unbiased coin is tossed repeatedly find the probability distribution of x

Four unbiased coins are tossed simultaneously let x be the random variabvel denoting the number of heads obtained obtain the probability distribution of x find E(x) and var(x) [symvbols have their usual meaning]

A fair die is tossed repeatedly until a 6 is obtained. Let X denote the number of tosses rerquired. The probability that X=3 equals

A fair coin is tossed repeatedly. If tail appears on first four tosses, then find the probability of head appearing on fifth toss.

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

Obtain the expection of the number of tails preceding the first head in the indefinite series of tosses of the same coin

A fair die is tossed repeatedly until a 6 is obtained. Let X denote the number of tosses rerquired. The conditional probability that Xge6 given Xgt3 equals

A random experiment consists of three independent tosses of a fair coin write down the sample space let x be the number of heads obtained obtain the probability distribution of x and calcualte its expectation and variance

Find the mean number of heads in three tosses of a fair coin.