Question: Let the pmf of a random variable X is defined as p(x) = mx; if x = 2 ,8,19,5, then what will be the value

Let the pmf of a random variable X is defined as p(x) = mx; if x = 2 ,8,19,5, then what will be the value of m Solution = 0.0294.
What probability technique is used, and please list steps how to solve this problem.

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