A company is studying the number of monthly absences among its 125 employees. the following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month.
number of days absent/probability
0 0.60
1 0.20
2 0.12
3 0.04
4 0.04
5 0.00
what is the variance of the number of days absent?