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3. Assume X1, X2 form a random sample (of size 2) from the following discrete distribution: 7 8 9 10 P(X = :) 0.15 0.20

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3. Assume X1, X2 form a random sample (of size 2) from the following discrete distribution: 7 8 9 10 P(X = :) 0.15 0.20 0.13 0.52 Find P(X1 > X2 -1). Show work and use proper notation. Hint: What is the joint pmf of X1 and X2? See the online solutions for Exam #2.] (12 points)

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