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2007 q56,3rd part

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renu SHARMA
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2007 q56,3rd part

renu SHARMA
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Dreyfus
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Re: 2007 q56,3rd part

Dreyfus
Cov(X,Y) = E(XY)-E(X)*E(Y)=5
Var(X+Y) = Var(X) + Var(Y) + 2*Cov(X,Y)
=4+25+(2*5)=39
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