# Show that: (a) Cov(X,Y) = E[XY] – E[X]E[Y]. (b) If X and Y are independent, then fY|X(y|x) = fY(y)

Question

Show that: (a) Cov(X,Y) = E[XY] – E[X]E[Y].

(b) If X and Y are independent, then fY|X(y|x) = fY(y)