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The random variable x is the number of people who have a college degree in a...

The random variable x is the number of people who have a college degree in a randomly selected group of four adults from a particular town. Its probability distribution is given in the table. Find the mean and variance of the random variable x.

X

0

1

2

3

4

p(x)

0.13

0.34

0.25

0.16

0.12

Math   Statistics-And-Probability   
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