# Question

The joint density of X and Y is given by

f(x, y) = e−y/y, 0 < x < y, 0 < y < ∞

Compute E[X3|Y = y].

f(x, y) = e−y/y, 0 < x < y, 0 < y < ∞

Compute E[X3|Y = y].

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