Let X be a random variable with the following probability distribution. Value x of X P(X=x) 0.30 0.05 0.10 7 0.15 8 0.40 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (x) = [] %3D |(b) Find the variance Var(X) of X. Var (x) = 0 %3D 6.

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