A discrete random variable x can take on the values 1,2,3,4, or 5. The probability function is Prob (x) = x/15, so the cumulative distribution function is
. The cumulative probability, F (4), and P (2 < x ≤ 5) are:
F (4) P (2 < x ≤ 5)
A.0.267 0.80
B.0.267 0.93
C.0.667 0.80
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