The following table shows the probability distribution for a discrete random variable.
х
12
15
17
20
22
24
25
30
P(X) 0.07 0.21 0.17 0.25 0.05 0.04 0.13 0.08
The mean of the discrete random variable Xis 19.59. What is the variance
of X? Round your answer to the nearest hundredth.
A. 31.06
оо
B. 34.71
C. 23.18
D. 26.55
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