A random variable X takes value 1 with probability and the value 2 with the remaining probability. What is the variance of X, Var[X]? 1/3 3/4 2/3 1/2 1/4

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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A random variable X takes value 1 with probability and the value 2 with the remaining
probability. What is the variance of X, Var[X]?
O
1/3
3/4
2/3
1/2
O 1/4
Transcribed Image Text:A random variable X takes value 1 with probability and the value 2 with the remaining probability. What is the variance of X, Var[X]? O 1/3 3/4 2/3 1/2 O 1/4
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The total probability of any probability distribution is always 1.

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