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# Mary persuaded n friends to donate \$500 each to her election

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Senior Manager
Joined: 10 Mar 2008
Posts: 331
Mary persuaded n friends to donate \$500 each to her election [#permalink]

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Updated on: 17 Sep 2008, 12:11
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Mary persuaded n friends to donate \$500 each to her election campaign, and then each of these n friends persuaded n more people to donate \$500 each to Mary’s campaign. If no one donated more than once and if there were no other donations, what was the value of n?

(1) The first n people donated 1/16 of the total amount donated.

(2) The total amount donated was \$120,000.

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Originally posted by vksunder on 16 Sep 2008, 14:28.
Last edited by vksunder on 17 Sep 2008, 12:11, edited 1 time in total.
VP
Joined: 21 Jul 2006
Posts: 1452
Re: DS: Equations [#permalink]

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16 Sep 2008, 15:35
vksunder wrote:
Mary persuaded n friends to donate \$500 each to her election campaign, and then each of these n friends persuaded n more people to donate \$500 each to Mary’s campaign. If no one donated more than once and if there were no other donations, what was the value of n?

(1) The first n people donated 161 of the total amount donated.

(2) The total amount donated was \$120,000.

Statement 1 doesn't make sense. Are you sure there isn't a typo here?
Senior Manager
Joined: 10 Mar 2008
Posts: 331
Re: DS: Equations [#permalink]

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17 Sep 2008, 12:11
I've corrected the error. Sorry!
VP
Joined: 17 Jun 2008
Posts: 1477
Re: DS: Equations [#permalink]

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18 Sep 2008, 00:22
D.

Total donation = 500n + 500n^2

From stmt1: 16(500n + 500n^2) = 500n....hence n = 15....sufficient.

From stmt2: 500n + 500n^2 = 120000.....can be solved for n....sufficient.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: DS: Equations   [#permalink] 18 Sep 2008, 00:22
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# Mary persuaded n friends to donate \$500 each to her election

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