Question: For two random variables, P ( X = 2 0 , Y = 0 ) = 0 . 4 , and P ( X =

For two random variables, P(X =20, Y =0)=0.4, and P(X =30, Y =50)=0.6. Given that E(X) is 26 and E(Y) is 30, the covariance of X and Y is:

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