Let X be a random variable with the following probability distribution. Value x of X P(X=x) 30 0.40 40 0.05 50 0.40 60 0.15 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (x) = D (b) Find the variance Var(X) of X. Var (x) = D

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A: Given: Let X be a random variable .

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Q: (a) Find the expectation E (X) of X. E (x) = [] (b) Find the variance Var(X) of X. Var(x) = D %3D

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