If the variance of the random variable X is 9 the S.D .of the random variable -4X+8 is

If the variance of the random variable X is 5 ,then variance of the random variable -3X is

Variance of a discrete random variable

Discrete random variable

Mean of a discrete random variable

A person on a high protein diet is interested in the random variable X, the gain in weight in a week. Then the random variable is

If variance of a random variable x is 23, then what is the variance of 2x+10:(a)56 (b) 33 (c) 46 (d) 92

If variance of variable is 50 then x=

If m and sigma^2 are the mean and variance of the random variable X whose distribution is given by