In the following table x is a discrete random variable and...

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In the following table, x is a discrete random variable and p(x) is the probability density. The standard deviation of x is

x 1 2 3

p(x) 0.3 0.6 0.1

A. 0.18

B. 0.36

C. 0.54

D. 0.6

Answer: Option D

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