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DS-Gprep

by xcusemeplz2009 » Fri Nov 13, 2009 3:16 am
pls show your solution/reasoning to support your ans...
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Source: — Data Sufficiency |
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by heshamelaziry » Fri Nov 13, 2009 9:44 am
from 1) 20(2p) - 20(c) = 2400 insufficient

from 2) 20(p+2) - 20(c)= 440 insuffecient

Combo:

solve for p and substitute in one of the equations to get C .

IMO C
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Re: DS-Gprep

by Testluv » Fri Nov 13, 2009 10:17 am
xcusemeplz2009 wrote:pls show your solution/reasoning to support your ans...
Really, we can ignore the "20".

Profit = sale price - cost
Profit = revenue - cost
P = R - C

The question wants us to figure out R - C

Statement One:

20*(2R) - 20C = 2400

2R - C = 120

Can't determine R - C

Insufficient.

Statement Two:

20(R + 2) - 20C = 440

20R + 40 - 20C = 440

20R - 20C = 400

R - C = 20

The second statement is independently sufficient.

Choose B.
Last edited by Testluv on Fri Nov 13, 2009 10:50 am, edited 3 times in total.
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by heshamelaziry » Fri Nov 13, 2009 10:32 am
really hate myself
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