For a random variable X, E(X)=3 and `E(X^2)=11` Then, variance of X is

For a random variable X, if Var (X) = 4 and E(X^(2))=13 , the value of E(X) is

For a random variable X, if Var (X) = 4 and E(X^(2))=13 , the value of E(X) is

The probability distribution of a random variable X is given by The variance of X is

The probability distribution of a random variable X is given below: The variance of X is

For a random variable X, if E(X) = 5 and V(X) = 6, then E(X^2) is equal to

For a random variable X, if E(X) = 5 and V(X) = 6, then E(X^2) is equal to

If mu " and " sigma^(2) are the mean and variance of the discrete random variable X, and E(X+3)=10 and E(X+3)^(2)=116 , find mu " and " sigma^(2) .

If for a random variable X, E(X) = 12 and Var (X) = 9 then find the value of E(2X+3) and Var (2X +3).