Question Attempt: 1 of 1 Let X be a random variable with the following probability distribution. Value x of X P( X=x) 30 0.35 40 0.05 50 0.05 60 0.15 70 0.40 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. X 5 ? E(X) = 0 (b) Find the variance Var(X) of X. Var(x) = 0