Let the probability distribution of random variable X be P(X= k) k! , k = 0, 1, 2, I then EX2 - ()

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Let the probability distribution of random variable X be
P(X= k) = ₁k=
, k = 0, 1, 2, ...
I
then EX²
=
()
Transcribed Image Text:Let the probability distribution of random variable X be P(X= k) = ₁k= , k = 0, 1, 2, ... I then EX² = ()
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Let X has a pmf

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