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Suppose that the probability mass function of a discrete random variable X is given by f(x) = { 3/4^x for x=1,2,3 , 0 otherwise (a)

Suppose that the probability mass function of a discrete random variable X is given by

f(x) = { 3/4^x for x=1,2,3 , 0 otherwise

(a) (3 points) Find the probability that X is odd

(b) (4 points) Calculate E[X].

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