If the standard deviation of the random variable X is `sqrt(3pq)` and mean is 3p then `E(x^(2))`= . . .

If standard deviation of a ravdom variable x is 2 then var(5x) is

For the random variable X , if V(X) = 4 , E(X) = 3 , then E(X^(2)) is …

The mean and standard deviation of random variable X are 10 and 5 respectively, then E((X-15)/(5))^(2)= ____

The mean and standard deviation of random variable X are 10 and 5 respectively, then E((X-15)/5)^(2) = ________.

The mean and standard deviation of random variable X are 10 and 5 respectively, then E((X-15)/5)^(2) = ________.

Mean and standard deviation of the random variable X are (7)/(3) and (14)/(9) respectively. Then find value of n and p.

Find the expected value,variance and standard deviation of a random variable X whose pmf is given below.

The mean and standard deviation of a random variable X are given by E(X) = 5 and sigma_(x)=3 respectively, then (1) E(X^(2))=……. (2) E[(3X-2)^(2)]= ………. (3) V(3-2X)= …………