Answered: Let X be a random variable with the…

Let X be a random variable with the following probability distribution. Calculate the following Find the expectation E (X) of X E (X) =? Find the variance Var (X) of X. Var (X) =?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

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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Question

Let X be a random variable with the following probability distribution.

Calculate the following

Find the expectation E (X) of X
E (X) =?

Find the variance Var (X) of X.
Var (X) =?

Value x de X P(X=x)
4
0.60
0.10
0.05
7
0.15
0.05
9
0.05
6.

Expert Solution

Step 1

X	4	5	6	7	8	9
P(X=x)	0.60	0.10	0.05	0.15	0.05	0.05

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