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6. If a discrete random variable X has the mof Mx (t) = e3(e'-1) (= exp[3(et - 1)] ), a. What is the expected value

6. If a discrete random variable X has the mof Mx (t) = e3(e'-1) (= exp[3(et - 1)] ), a. What is the expected value of X? b. What is the standard deviaion of X

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