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- #1

^{2}Y

^{2}].

I have that Cov(X, Y) = E[(X - 0)(Y - 0)] = E[XY] = p.

I have no idea how to continue on however. I can't think of a way to relate E[X

^{2}Y

^{2}] with E[XY]. I have considered the Var(XY) but that also involved E[X

^{2}Y

^{2}] and thus wouldn't help me in finding E[X

^{2}Y

^{2}].

Can someone offer a hint or two on how to proceed?