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The random variable x is the number of houses sold

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.

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.

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