Let X, Y and Z be three independent random variables such that E(X)=E(Y)=2E(Z)=2 and E(X?)=E(Y²)=E(Z²)=10. Then Var(X+Y+Z) is equal to: O 24 O 22 O None of the other options O 21
Let X, Y and Z be three independent random variables such that E(X)=E(Y)=2E(Z)=2 and E(X?)=E(Y²)=E(Z²)=10. Then Var(X+Y+Z) is equal to: O 24 O 22 O None of the other options O 21
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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Transcribed Image Text:Let X, Y and Z be three independent random variables such that E(X)=E(Y)=2E(Z)=2
and E(X²)=E(Y²)-E(Z?)=10. Then Var(X+Y+Z) is equal to:
24
22
None of the other options
21
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