Determine whether each of the distributions given below represents a probability distribution. Justi


Question: Determine whether each of the distributions given below represents a probability distribution. Justify your answer. (6 pts)

a)
x 1 2 3 4
P(x) 1/4 5/12 1/3 1/6
b)
x 3 6 8
P(x) 0.1 3/5 0.3
c)
x 20 30 40 50
P(x) 0.2 -0.2 0.7 0.3
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