Question: 6.6 Conditional density functions 95 Exercise 6.55 Let X and Y be random variables with joint density function f (x, y) = ( 1 4

6.6 Conditional density functions 95 Exercise 6.55 Let X and Y be random variables with joint density function f (x, y) =

(

1 4 e−1 2 (x+y) if x, y > 0, 0 otherwise.

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