Question: Hello, I am stuck on a homework problem regarding discrete random variable and variance. What is the formula that I would use to solve the

Hello, I am stuck on a homework problem regarding discrete random variable and variance. What is the formula that I would use to solve the problem below.

Suppose Y is a discrete random variable with probability distribution given by:

P(Y = k) = k/15 , for k = 1, 2, 3, 4, 5

a)Calculate the expected value of Y. Give your answer to 2 decimal places.

E[Y] =

b)Calculate the variance of Y. Give your answer as a decimal to 2 decimal places.

VAR[Y] =

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