Question: Let X be a discrete random variable with probability distribution function given by pX (n) = /2^n for n 3 , and pX (x) =

Let X be a discrete random variable with probability distribution function given by pX (n) = /2^n for n 3 , and pX (x) = 0 when x /{3,4,...,}.

1.Compute .

2.Compute E[X]. You need to simplify your answer. 3. (2 pts) Compute P(X > 4).

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