Hey noblewhale.

Hint: The expectation is distributive where E[(X-a)(Y-b)] = E[XY] - E[bX] - E[aY] + E[ab].

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- October 4th 2012, 04:20 PM #1

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- October 4th 2012, 05:29 PM #2

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- October 5th 2012, 07:08 PM #3

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