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1. Determine if the following are probability distributions (if no, state why). a. X 3 6 9 12 15 P(X) 5/9 1/9 3/9 3/9 1/9

1. Determine if the following are probability distributions (if no, state why).

a. X 3 6 9 12 15

P(X) 5/9 1/9 3/9 3/9 1/9

b. X 1 2 3 4 5

P(X) 3/10 1/10 1/10 2/10 3/10

c. X 20 30 40 50

P(X) 0.1 -0.9 0.9 0.9

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