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The cost to park a car in a certain parking garage is $8.00

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by BTGmoderatorDC » Wed Apr 03, 2019 6:18 pm

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Answers

A

B

C

D

E

Stats

Difficulty—

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

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by Jay@ManhattanReview » Wed Apr 03, 2019 9:34 pm
BTGmoderatorDC wrote: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
Total parking charges for 9 hours = 8 + 1.75*(9 - 2) = 8 + 1.75*7 = $20.25
Thus, average (arithmetic mean) cost per hour to park a car in the parking garage for 9 hours = $20.25/9 = $2.25

The correct answer: C

Hope this helps!

-Jay
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by deloitte247 » Sat Apr 06, 2019 3:23 pm
Cars spent total of 9 hours
First 2 hours = $8.00
Excess 7 hours = $1.75 * 7 = $12.25
Total cost = $12.25 + $8.00 = $20.25
$$Average\ \cos t\ per\ hour\ =\ \frac{$20.25}{9\ hrs}\ =\ $2.25\ per\ hour$$

Option C is the correct answer
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by Scott@TargetTestPrep » Sun Apr 07, 2019 5:27 pm
BTGmoderatorDC wrote: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
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

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