Let x be a random variable with distribution ....,. If mean of x is 2.3

When a die is rolled twice, if the event of getting an even number is denoted by a success and the number of successes as a random variable, then distribution and mean of the variate are

X is a random variable with distribution given below {:(x:,0,1,2,3),(P(X=x):,k,3k,3k,k):} The value of k and its variance are

A random variable X has the following distribution

Let a random variable X have a binomial distribution with mean 8 and variance r. If P(X le 2 ) = (k)/(2^(16)) , then k is equal to

Let a random variable X have a binomial distribution with mean 8 and variance 4. If P(x le2)=(k)/(2^(16)) , then (k-47)/(10) is equal to __________.

A random variable X has the distribution. Then , variance of the distribution, is

A random variable X has the following distribution . The mean and variance of x are

If a random variable X follows binomial distribution with mean 3 and variance 3/2, find P(Xlt=5)dot

If m and sigma^(2) are the mean and variance of the random variable X, whose distribution is given by: {:(X=x:,0,1,2,3),(P(X=x):,(1)/(3),(1)/(2),0,(1)/(6)):}

A coin is loaded such that P(H)=3P(T) . It is tossed 3 times. Let X be the random variable which indicates the number of heads which occur. Find the mean of X, variance of X.