A study shows that employees that begin their workday at 9:00 a.m.vary their times of arrival uniformly from 8:40 a.m.to 9:30 a.m.The probability that a randomly chosen employee reports to work between 9:00 and 9:10 is:
A)40 percent.
B)20 percent.
C)10 percent.
D)30 percent.
E)16.7 percent.

Question

Quizplus · Accepted Answer

The total range of arrival times is 50 minutes (from 8:40 to 9:30). The time interval from 9:00 to 9:10 is 10 minutes. The probability is the ratio of the interval to the total range: 10/50 = 0.20 or 20 percent.

A Study Shows That Employees That Begin Their Workday at 9:00