Suppose that X and Y have the joint probability mass function x+y P (X = x, Y = y) = , x = 1, 2, 3 and y = 1, 2 (and equals 0 otherwise). Let Z = X + Y, find P (Z > 4).

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Let Z=X+Y, find P(Z≥4).

Suppose that X and Y have the joint probability mass function
x+y
P (X = x, Y = y) = , x = 1, 2, 3 and y = 1, 2 (and equals 0 otherwise).
Let Z = X + Y, find P (Z > 4).
Transcribed Image Text:Suppose that X and Y have the joint probability mass function x+y P (X = x, Y = y) = , x = 1, 2, 3 and y = 1, 2 (and equals 0 otherwise). Let Z = X + Y, find P (Z > 4).
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