Question: If the probability mass function of a random variable is given by P(X = r) = kr,r = 1,2,3,4, find (i) The value of

If the probability mass function of a random variable is given by 

If the probability mass function of a random variable is given by P(X = r) = kr,r = 1,2,3,4, find (i) The value of k. (i) PG < X 0) (iii) P(x = 1.5)

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