Question

Suppose Y is a discrete random variable with probability mass function p(y) - P(Y -y) - fory - 1,2, ..., n. Show that p(y) satisfies the conditions of a pmf.

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Answer #1

Now the endihin n(m+リ

NOTE : the sum of 1st n natural numbers is n(n+1)/2 which is used in the following problem.

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