# 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.