If E(X) = 5, E(Y) = 2, E(XY) = 11, then find Cov(X,Y).

1.	If E(X) = 5, E(Y) = 2, E(XY) = 11, then find Cov(X,Y).
Answer» We know that Cov(X, Y) = E(XY) – E(X).E(Y) = 11 – (5) (2)=11 -10= 1.

Answer»

We know that Cov(X, Y) = E(XY) – E(X).E(Y)

= 11 – (5) (2)=11 -10= 1.

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