題組內容
3. (30 %) Let random variables $X$ and $Y$ have the joint p.d.f. $$f(x, y) = cxy^3, \quad 0 < y < x < 1$$
(b) Find the marginal p.d.f.s of \( X \) and \( Y \).
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3. (30 %) Let random variables $X$ and $Y$ have the joint p.d.f. $$f(x, y) = cxy^3, \quad 0 < y < x < 1$$
(b) Find the marginal p.d.f.s of \( X \) and \( Y \).