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

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The cost to park a car in a certain parking garage is $8.00  [#permalink]

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New post 12 Jan 2016, 06:26
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Question Stats:

84% (01:41) correct 16% (01:38) wrong based on 109 sessions

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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

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Re: The cost to park a car in a certain parking garage is $8.00  [#permalink]

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New post 12 Jan 2016, 06:34
BrainLab 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


Total cost of parking for 9 hours = 8$ for the first 2 hours and then 1.75 for (9-2) hours = 8+7*1.75 = 20.25

Thus the AVERAGE parking price = 20.25/9 = 2.25 $

C is the correct answer.
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Re: The cost to park a car in a certain parking garage is $8.00  [#permalink]

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New post 12 Jan 2016, 10:45
BrainLab 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


First 2 hours ----> $8.00
For next 7 hours ------>7 * $1.75

For 9 Hours total cost is $8.00 + $12.25 =$20.25

Average cost for 9 hours is 20.25/9 => $2.25

Hence answer is (C) $2.25
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Re: The cost to park a car in a certain parking garage is $8.00  [#permalink]

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New post 07 Apr 2019, 18:29
BrainLab 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


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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Re: The cost to park a car in a certain parking garage is $8.00   [#permalink] 07 Apr 2019, 18:29
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