Probability distribution function of discrete random variable X is given as follows. Which of the following is true? Random variable x 2 4 5 Probability distribution function 0.3 0.1 0.4 0.2 Select one: a. 1.8 s Variance of X < 2.4 b. 3.4 s Variance of X < 4.2 c. 3.0 s Variance of X < 3.4 d. 2.4 s Variance of X < 3.0 e. Variance of X 2 4.2 f. Variance of X < 1.8

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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Probability distribution function of discrete random variable X is given as follows. Which of the following is true?
Random variable x
2
4
5
Probability distribution function
0.3
0.1
0.4
0.2
Select one:
a. 1.8 s Variance of X < 2.4
b. 3.4 s Variance of X < 4.2
c. 3.0 s Variance of X < 3.4
d. 2.4 s Variance of X < 3.0
e. Variance of X 2 4.2
f. Variance of X < 1.8
Transcribed Image Text:Probability distribution function of discrete random variable X is given as follows. Which of the following is true? Random variable x 2 4 5 Probability distribution function 0.3 0.1 0.4 0.2 Select one: a. 1.8 s Variance of X < 2.4 b. 3.4 s Variance of X < 4.2 c. 3.0 s Variance of X < 3.4 d. 2.4 s Variance of X < 3.0 e. Variance of X 2 4.2 f. Variance of X < 1.8
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