Let X be a random variable with the following probability distribution. Value  x  of  X P (X =x) 0 0.15 10 0.25 20 0.15 30 0.30 40 0.15 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation  E (X) of X.   E (X) =   (b) Find the variance Var (X) of X.   Var (X)=

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A: According our policy we can answer only first question for remaining please repost the question.

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