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(Twenty points).There is a random variable X.It has the probability distribution of f(x) = 3x - x2, for2.085 < x < 3.What is E(X)?You must

(Twenty points).There is a random variable X.It has the probability distribution of f(x) = 3x - x2, for2.085 < x < 3.What is E(X)?You must explain how you got the answer in detail.

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