The Manager of a Car Wash Wants to Know How

Multiple Choice

The manager of a car wash wants to know how fast his new crew is processing cars through the wash area. He notices that it takes cars an average of about 30 minutes in line to reach the car wash, and his spot checks during the day indicated an average of seven cars in line waiting to be washed. What was the processing rate for his new crew that day?

A) less than or equal to 2.0 minutes per car
B) greater than 2.0 but less than or equal to 3.0 minutes per car
C) greater than 3.0 but less than or equal to 4.0 minutes per car
D) greater than 4.0 minutes per car