Customers arrive at the local grocery store at a steady rate of 40 an hour.Thirty percent of these customers purchase 10 items or less and go to the express line where they enjoy an average checkout time of 5 minutes.Customers that don't meet the express line criterion go to checkout line #2 where they spend an average of 10 minutes checking out.How many people are checking out in line #2 on average?
A) Less than or equal to one
B) Greater than one but less than or equal to three
C) Greater than three but less than or equal to five
D) Greater than five

Question

Quizplus · Accepted Answer

70% of 40 customers (28 customers) go to line #2. With an average checkout time of 10 minutes, the average number of people in line #2 is 28*(10/60) = 4.67, which falls between three and five.

Customers Arrive at the Local Grocery Store at a Steady