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A quiz consists of two parts. For a randomly selected student, let X = the number of points earned on the first part, and Y

  1. A quiz consists of two parts. For a randomly selected student, let X = the number of points earned on the first part, and Y = the number of points earned on the second part. Below is the joint pmf for X and Y

p(x,y) y
0 5 10
0 0.06 0.09 0.05
x 5 0.07 0.19 0.23
10 0.02 0.15 0.14

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