Use the following information to answer the next five exercises: A company wants to evaluate its attrition rate, in other words, how long new hires stay with the company. Over the years, they have established the following probability distribution.

Let X = the number of years a new hire will stay with the company.

Let P(x) = the probability that a new hire will stay with the company x years.

x P(x) 0 - 0.12

1 - 0.18

2 - 0.30

3 - 0.15

4 - 0.10

5 - 0.10

6 - 0.05

1. P(x = 4) = _______

2. On average, how long would you expect a new hire to stay with the company?