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# 500%

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Intern
Joined: 07 Feb 2006
Posts: 25

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09 Apr 2009, 09:59
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A mechanic bought 150 oil filters from a wholesaler for D dollars. He then sold the filters to his customers at 500% of the original price per filter. In terms of D, what was the cost of each oil filter for the mechanic’s customers?

Each filter sold at 500% will make the price 6D. Right?

6D/150 = D/25 (is my answer).

Official answer is 2D/75. Where am i going wrong !!

Kudos [?]: [0], given: 0

Director
Joined: 04 Jan 2008
Posts: 896

Kudos [?]: 737 [0], given: 17

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09 Apr 2009, 10:18
D becomes 5D and not 6D,IMO

hence OA=5D/150=D/30

source?
jeevanchand wrote:
A mechanic bought 150 oil filters from a wholesaler for D dollars. He then sold the filters to his customers at 500% of the original price per filter. In terms of D, what was the cost of each oil filter for the mechanic’s customers?

Each filter sold at 500% will make the price 6D. Right?

6D/150 = D/25 (is my answer).

Official answer is 2D/75. Where am i going wrong !!

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Kudos [?]: 737 [0], given: 17

Director
Joined: 01 Apr 2008
Posts: 879

Kudos [?]: 816 [0], given: 18

Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014

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10 Apr 2009, 01:28
Agree with nitya34..should be D/30.
nitya34 wrote:
D becomes 5D and not 6D,IMO

hence OA=5D/150=D/30

source?
jeevanchand wrote:
A mechanic bought 150 oil filters from a wholesaler for D dollars. He then sold the filters to his customers at 500% of the original price per filter. In terms of D, what was the cost of each oil filter for the mechanic’s customers?

Each filter sold at 500% will make the price 6D. Right?

6D/150 = D/25 (is my answer).

Official answer is 2D/75. Where am i going wrong !!

Kudos [?]: 816 [0], given: 18

Manager
Joined: 02 Mar 2009
Posts: 134

Kudos [?]: 52 [0], given: 0

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11 Apr 2009, 04:14
I agree too. Should be D/30.

Source?

Kudos [?]: 52 [0], given: 0

Re: 500%   [#permalink] 11 Apr 2009, 04:14
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