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could i have help on parts a, b, and c? please show work so i can follow your solving process. thank you! Question 3. Suppose

could i have help on parts a, b, and c? please show work so i can follow your solving process. thank you!
Question 3. Suppose that the pmf of T'= the revenue from a single trip is given by 10 20 Pr(1) 0.2 0.4 0.4 (a) Show that E(7) = 12 and V(T) = 56. (b) Let 71. T, be a random sample of size n = 2. Find the pmf of 7 = Dith. 5 10 15 20 (c) Find E(7) and V(T)

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