The cost to park a car in a certain parking garage is $8.00 for up to 2 hours of parking and

[BTGmoderatorDC]

The cost to park a car in a certain parking garage is $8.00 for up to 2 hours of parking and $1.75 for each hour in excess of 2 hours. What is the average (arithmetic mean) cost per hour to park a car in the parking garage for 9 hours?

(A) $1.09
(B) $1.67
(C) $2.25
(D) $2.37
(E) $2.50


OA C

Source: GMAT Prep

[Scott@TargetTestPrep]

The cost to park a car in a certain parking garage is $8.00 for up to 2 hours of parking and $1.75 for each hour in excess of 2 hours. What is the average (arithmetic mean) cost per hour to park a car in the parking garage for 9 hours?

(A) $1.09
(B) $1.67
(C) $2.25
(D) $2.37
(E) $2.50


OA C

Source: GMAT Prep

Solution:

The total cost for 9 hour is:

8 + 1.75 x 7 = 8 + 12.25 = $20.25

So the average cost per hour is 20.25/9 = $2.25.

Answer: C