gmat pre question

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gmat pre question

by pradeepkaushal9518 » Fri May 07, 2010 12:13 pm
Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persua ded 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 of the total amount donated.
(2) The total amount donated was $120,000.

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by scoobydooby » Fri May 07, 2010 12:17 pm
pradeepkaushal9518 wrote:Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persua ded 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 of the total amount donated.
(2) The total amount donated was $120,000.

typo in statement 1?

2) is sufficient.
500*n+500*n^2=120,000 (each of n persuaded n more people=>n^2)
can be solved for n

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by ansumania » Sat May 08, 2010 9:42 am
what's OA