Answer the question. Suppose that voting in municipal elections is being studied and that the accompanying tables describe the probability distribution for four randomly selected people, where x is the number that voted in the last election. Is it unusual to find four voters among four randomly selected people?

x - P(x)

1 - 0.23

2 - 0.32

3 - 0.26

4 - 0.04

Yes or No?

Find the mean of the given probability distribution. In a certain town, 70% of adults have a college degree. The accompanying table describes the probability distribution for the number of adults (among 4 randomly selected adults) who have a college degree.

x - P(x)

1 - 0.0081

2 - 0.0756

3 - 0.4116

4 - 0.2401

Group of answer choices

= 2.70

= 2.00

= 2.81

= 2.80

Provide an appropriate response. Round to the nearest hundredth. The random variable x is the number of houses sold by a realtor in a single month at the Sendsom's Real Estate Office. Its probability distribution is as follows. Find the standard deviation for the probability distribution.

Houses sold (x) - Probability P(x) 0 - 0.24

1 - 0.01

2 - 0.12

3 - 0.16

4 - 0.01

5 - 0.14

6 - 0.11

7 - 0.21

Group of answer choices

= 6.86

= 2.25

= 4.45

= 2.62