- #1

elmarsur

- 36

- 0

## Homework Statement

A random variable X has the generating function

f(z) = 1 / (2-z)^2

Find E(X) and Var(X).

## Homework Equations

## The Attempt at a Solution

Would anyone explain in simpler terms the notion of the generating function, such that I may be able to solve problems? All I have found were proofs, but nothing of practical use.

Thank you very much!