Let X, Y be discrete random variables. Sup- pose that X, Y are independent, and each has a uniform distribution over the numbers {1,2, 3}. Find Var(X – Y).

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 9ECP: A random number generator selects two integers from 1 to 30. What is the probability that both...
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Let X, Y be discrete random variables. Sup-
pose that X, Y are independent, and each has a
uniform distribution over the numbers {1, 2, 3}.
Find Var(X – Y).
1.533
1.333
2.000
0.000
2.333
Transcribed Image Text:Let X, Y be discrete random variables. Sup- pose that X, Y are independent, and each has a uniform distribution over the numbers {1, 2, 3}. Find Var(X – Y). 1.533 1.333 2.000 0.000 2.333
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