1) If Var(X-Y) = 2, Var(X+ Y) = 4, E(X) = 3 and E(Y) E(XY)? = 1, than what is

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 22E
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1) If Var(X- Y) = 2, Var(X+ Y) = 4, E(X) = 3 and E(Y) = 1, than what is
E(XY)?
2) IfX and Y are independent random variables with, E(X)%30%3D E(Y),
show that Var(XY) Var(X) x Var(Y).
%3D
Transcribed Image Text:1) If Var(X- Y) = 2, Var(X+ Y) = 4, E(X) = 3 and E(Y) = 1, than what is E(XY)? 2) IfX and Y are independent random variables with, E(X)%30%3D E(Y), show that Var(XY) Var(X) x Var(Y). %3D
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