The joint distribution of the random variable X and Y is given in the following table 1 3. 4 Y 0. 18 18 18 1. 18 1. 3. 18 4. If P(X + Y > 5) = then a and b are equal to: O a=1/8 and b-D3/8 O a=1/8 and b-1/16 ex9 docy -1911 2.

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