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Suppose X and Y are the scores that a student will receive, respectively, on the verbal...

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Statistics

Suppose X and Y are the scores that a student will receive,respectively, on the verbal and math portions of the SAT test.Further suppose that X and Y are both Nor(700, 10000) and thatCov(X, Y ) = 2500. Find the probability that the total score, X + Y, will exceed 1500. (You can assume that X + Y is normal.)

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W Total ScoreWXYEW EXY EXEY 7007001400VarW VarXY VarXVarY2CovXY 1000010000250022500Therefore W    See Answer
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