Question: Let X be a random variable with the following probability distribution. Value x of X P (X-x) 20 0.10 30 0.15 40 0.60 50 0.10

Let X be a random variable with the following probability distribution. Value x of X P (X-x) 20 0.10 30 0.15 40 0.60 50 0.10 60 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E(X) = 0 X (b) Find the variance Var(X ) of X. Var (X) =

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