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If a discrete random variable X has the probability mass function(pmf): f(x)= f ( s q r t 2 k ) x or x =

If a discrete random variable X has the probability mass function(pmf): f(x)= f(sqrt2k)x or x = 2; 4; 6; 8; and k > 0.

a. What is k ?

b. What is P(X >= 4)

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