Random Variables

Discrete random variable || Mean & variable OF random variable || Binomial probability distribution

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

The random variable X is the amount of syrup prescript by a physician. Then the random variable is

A random variable is said to be continuous, if

A random variable is said to be discrete, if

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

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

Let a pair of dice he rolled thrice and the random variable X be the number of doublets. Find the mean of the random variable.

An economist is interested in the random variable X, the number of unemployed graduates in a town of population 1 lakh. Then the random variable is