66. Consider two random variables X and Y with V(X) = 5, V(Y) = 10 and Cov(X,Y) = 3. (a) Find V(3X - Y). (b) Repeat part (a) under the assumption that Cov(X,Y)= 0

A First Course in Probability (10th Edition)
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66. Consider two random variables X and Y with V(X) = 5, V(Y) = 10 and Cov(X,Y) = 3.
(a) Find V(3X - Y).
(b) Repeat part (a) under the assumption that Cov(X,Y)= 0
Transcribed Image Text:66. Consider two random variables X and Y with V(X) = 5, V(Y) = 10 and Cov(X,Y) = 3. (a) Find V(3X - Y). (b) Repeat part (a) under the assumption that Cov(X,Y)= 0
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