Let X be a random variable with the following probability mass function (pmf): + ż e ) X=0,1,2,.. z! O, otherwise. Show that p(x; 21, A2) satisfies the two conditions necessary to be a legitimate pmf. Determine E(X) and V(X).

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Let X be a random variable with the following probability mass function (pmf):
p(x;,22) =
te * 1 , x= 0,1, 2,...
x!
x!
O, otherwise.
Show that p(x; A1, 12) satisfies the two conditions necessary to be a legitimate pmf.
Determine E(X) and V(X).
Transcribed Image Text:Let X be a random variable with the following probability mass function (pmf): p(x;,22) = te * 1 , x= 0,1, 2,... x! x! O, otherwise. Show that p(x; A1, 12) satisfies the two conditions necessary to be a legitimate pmf. Determine E(X) and V(X).
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