Question

If X and Y are random variables the E(X-Y)= a) E(X)+E(Y) b) E(X)-E(Y) c) E(X)-Y d) X-E(X)

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Answer 1

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Explanation:

The answer is

b) E(X)-E(Y)

Actually E(aX+bY) = a E(X) + b E(Y)