What is the covariance between the two total scores x1x2

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Reference no: EM13576110

Let:

X1 and X2 be quantitative and verbal scores on an exam

Y1 and Y2 be quantitative and verbal scores on another exam

If:

Cov(X1, Y1) = 5

Cov(X1, Y2) = 1

Cov(X2, Y1) = 2

Cov(X2, Y2) = 8

What is the covariance between the two total scores X1+X2 and Y1+Y2?

Reference no: EM13576110

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