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3. the probability distribution of a random variable x is given...

# Question: the probability distribution of a random variable x is given...

###### Question details

The probability distribution of a random variable X is given below.

 x 3 4 7 9 10 P(X=x) 7/26 5/26 2/13 4/13 1/13

Given the mean

Find the variance (Var(X)) and the standard deviation, respectively.