Given the following relative-frequency table for the probability distribution of X, what are the expected value (u) and the standard deviation (o)?
x P(X = x)
5 .10
10.14
15.29
20.47

A Op=15.65, o = 15.94
B. Op 17.98, o = 15.94
C. Op 15.65, o = 4.98
D. O=269.75, o = 4.98​