Suppose that X and Y have the joint probability mass function P(X = x, Y = y) = x+y 21 x = 1, 2, 3 and y = 1,2 (and equals O otherwise). Let Z = X – Y, find P (Z > 0).

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A: Given: x=-7

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A: First find the values of these two numbers.

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Q: through: (-1, -3), perp. to y=* --X- 1

A: Our Aim is to write the equation of line passing through (-1,-3)and perpendicular to y=-13x-1 -(i)

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A: See the attachment

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