A Car Wash Services 200 Customers in a 4-Hour Span

Multiple Choice

A car wash services 200 customers in a 4-hour span on a lovely Saturday afternoon. The car wash employs 5 washers at $6 per hour. An appropriate measure of productivity is:

A) 200 cars/hour.
B) 0.6 $/car.
C) 8.3 cars/$.
D) 1.7 cars/$.