The random variable x is the number of houses sold by a realtor in a single month at the real-estate office. Its probability distribution is:Houses sold (x) Probability P(x)
0 ...........0.09
1............0.24
2............0.21
3............0.17
4............0.03
5............0.15
6............0.09
7............0.02
a. Compute the mean of the random variable.
b. Compute the standard deviation of the random variable.