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Verify whether or not each of the following is a

Verify whether or not each of the following is a probability function. State your conclusion and explain.

a. f (x) = 3x/8x for x _ 1, 2, 3, 4

b. f (x) _ 0.125, for x _ 0, 1, 2, 3 and f (x) _ 0.25, for x _ 4, 5

c. f (x) _ (7 - x)/28, for x _ 0, 1, 2, 3, 4, 5, 6, 7

d. f (x) _ (x2 + 1)/60, for x _ 0, 1, 2, 3, 4, 5

a. f (x) = 3x/8x for x _ 1, 2, 3, 4

b. f (x) _ 0.125, for x _ 0, 1, 2, 3 and f (x) _ 0.25, for x _ 4, 5

c. f (x) _ (7 - x)/28, for x _ 0, 1, 2, 3, 4, 5, 6, 7

d. f (x) _ (x2 + 1)/60, for x _ 0, 1, 2, 3, 4, 5

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