## Question 213:

Let X be a random variable with the following probability distribution. Find the expectation and variance E(X) Var (X)of X.Value

x of X P(X=x)

10 0.10

20 0.30

30 0.05

40 0.10

50 0.05

60 0.40

What formula would I use? Can you break it down into baby steps so I can understand how you got the answer? Thanks