Find whether distributions signify probability distribution
Determine whether each of the distributions given below represents a probability distribution. Justify your answer.
(A)
x
1
2
3
4
P(x)
1/3
7/12
1/4
0
(B)
6
8
0.4
0.3
(C)
20
35
40
50
0.5
-0.2
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