Random variables X and Y have the joint PMF Se(a² + y²), if x € {1,2, 4} and y E {1,3} fx,y (x, y) = otherwise (d) What is P(Y = X)? (e) What is P(Y = 3)? (f) Find the marginal PMFS px(x) and py (y).

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Random variables X and Y have the joint PMF
Se(a² + y²),
if x € {1,2,4} and y E {1,3}
fx,y(x, y) =
0,
otherwise
(d) What is P(Y = X)?
(e) What is P(Y = 3)?
(f) Find the marginal PMFS px(x) and py (y).
(g) Find the expectations E[X], E[Y] and E[XY].
(h) Find the variances Var(X), Var(Y) and Var(X +Y).
(i) Let A denote the event X >Y. Find E[X | A] and Var(X | A)
Transcribed Image Text:Random variables X and Y have the joint PMF Se(a² + y²), if x € {1,2,4} and y E {1,3} fx,y(x, y) = 0, otherwise (d) What is P(Y = X)? (e) What is P(Y = 3)? (f) Find the marginal PMFS px(x) and py (y). (g) Find the expectations E[X], E[Y] and E[XY]. (h) Find the variances Var(X), Var(Y) and Var(X +Y). (i) Let A denote the event X >Y. Find E[X | A] and Var(X | A)
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