Mean Of A Random Variable| Variance Of A Random Variable#!#Solved Examples

Discrete random variable

Variance of a discrete random variable

Mean of a discrete random variable

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

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

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

A random variable is said to be discrete, if

A random variable is said to be continuous, if

If the probability distribution of a random variable X is as given below Then, mean and variance are

The mean and variance of a random variable X having a binomial probability distribution are 6 and 3 respectively, then the probabiltiy P(X ge 2) is