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donation

by pradeepkaushal9518 » Sat May 08, 2010 3:30 am
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 1/16 of the total amount donated.
(2) The total amount donated was $120,000.
Last edited by pradeepkaushal9518 on Sat May 08, 2010 4:47 am, edited 1 time in total.
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by gmatmachoman » Sat May 08, 2010 4:10 am
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.
I am not able to understand what does st1 mean?
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by pradeepkaushal9518 » Sat May 08, 2010 4:48 am
question corrected plz check
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by gmatmachoman » Sat May 08, 2010 5:13 am
pradeepkaushal9518 wrote:question corrected plz check
pradeepkaushal9518 wrote:question corrected plz check
Thx bhai

IMO B

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?

We will get a equation like

500 *n + 500 *n^2 = 120000
Solve for n

n =15

St 1 does not give any idea about total amount .

st 2 gives that to set up the equation. There is no necessity to solve for n. But I f u are so keen it will be equal to 15.
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