GMAT prep DS question

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GMAT prep DS question

by gxj007 » Sun Aug 30, 2009 1:22 pm
I'm not sure why (c) wouldn't be correct here. If you know the relationship of the purchase price and the selling price, I feel like that is enough info to solve???


Martha bought an armchair and a table from an auction and then sold both items. Her gross profit from the sale of the armchair was what percent greater than her gross profit from the sale of the table?

1) She paid 10% more for the armchair than the table
2) She sold the armchair for 20% more than what she sold the table for.


Answer:

E - neither statement works
Source: — Data Sufficiency |

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by bharathh » Sun Aug 30, 2009 8:31 pm
1 Insufficient to get profit from only sales price

What you can get are equations to describe the prices each item was bought

C = cost of table
C+C/10 = cost of armchair

2. Insufficient as you don't know what the items were bought for

Equations for items sold
S = selling price of table
S + S/5 = selling price of armchair

Profit % for armchair
(S+S/5 - C+C/10)*100/C = ?

Same for table.

No numbers there to give us any indication on how to solve this. So E