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Word Tanslation

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samirashok
 Post subject: Word Tanslation
 Post Posted: Tue Sep 07, 2010 8:57 pm 
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Course Students


Posts: 2
I found this in the OG DS set. I have reframed it using different variables. I wanted help with the word translation to form an equation

M persuaded x friends to donate $400 each to her charity fund, and then each of these x friends persuaded x more people to donate $400 to the charity fund.

The solution is given as
Amount contributed towards the charity fund = 400(x^2 + x)
I HAVE A HARD TIME FIGURING THIS OUT. CAN SOMEONE HELP SIMPLIFY THIS EQN PLEASE?

THANKS,
SAMEER.
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gokul_nair1984
 Post subject: Re: Word Tanslation
 Post Posted: Wed Sep 08, 2010 8:16 am 
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Students


Posts: 170
samirashok try to look at it in this manner:

samirashok wrote:
M persuaded x friends to donate $400 each to her charity fund, and then each of these x friends persuaded x more people to donate $400 to the charity fund.


Step 1: x friends donated 400 translates into 400*x=400x---(1)

Step 2: Each x gets x more people , this means x*x=x^2
These people also contribute 400. =>400(x^2)---(2)

Total Money accummulated=(1) +(2)= 400x+400(x^2)
Taking 400 common, we get 400(x+x^2)
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samirashok
 Post subject: Re: Word Tanslation
 Post Posted: Wed Sep 08, 2010 9:21 pm 
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Course Students


Posts: 2
Got it! Thanks Gokul. I was just stuck with the solution as

400x(400x)
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mschwrtz
 Post subject: Re: Word Tanslation
 Post Posted: Sat Sep 18, 2010 1:37 am 
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ManhattanGMAT Staff


Posts: 507
Please, no posts in this forum except on MGMAT CAT Quant.
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