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| revprev | Admin | Jun 28'24 at 1:46 | −1 | m | |
| revcur | Admin | (Created page with "'''Solution: D''' We have <math display = "block"> \begin{aligned} E((X+Y)^2) = E(X^2) + 2E(XY) + E(Y^2) &= 2E(X^2) + E(X)^2 \\ &= \frac{2}{3} + \frac{1}{4} \\ &= \frac{11}{12} \end{aligned} </math>") | Jun 28'24 at 1:35 | +200 |