GMATPrep Bookstore

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lilu: Master | Next Rank: 500 Posts; Posts: 148; Joined: Wed Dec 10, 2008 5:13 pm; Location: SF, CA; Thanked: 12 times

by lilu » Wed May 06, 2009 8:31 pm

I would appreciate an explanation

I'll post the OA after a few responses

Sorry, I had trouble attaching the question.

Here it is typed:
A bookstore that sells books sells each of its paperbacks for a certain price and each of its hardcover books for a certain price. If Joe, Maria, and Paul bought books in this store, how much did Maria for 1 paperback and hardcover book?

1. Joe bought 2 paperback and 3 hardcover books for $12.50
2. Paul bought 4 paperback and 6 hardcover books for $25.00

The more you look, the more you see.

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Source: Beat The GMAT — Data Sufficiency | Wed May 06, 2009 8:31 pm

Vemuri: Legendary Member; Posts: 682; Joined: Fri Jan 16, 2009 2:40 amFollowed by: 1 member; Thanked: 32 times

Re: GMATPrep Bookstore

by Vemuri » Wed May 06, 2009 11:48 pm

IMO E.

Statement 1: Can be represented in an equation as 2P+3H=12.5. 2 variables & 1 equation, so not sufficient

Statement 2: Can be represented in an equation as 4P+6H=25 ==> 2P+3H=12.5. 2 variables & 1 equation, so not sufficient

Together also the statements are not sufficient because they both represent the same equation.

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Vitalina: Master | Next Rank: 500 Posts; Posts: 116; Joined: Tue Dec 09, 2008 12:30 pmFollowed by: 2 members; Thanked: 3 times; GMAT Score:670

by Vitalina » Thu May 07, 2009 3:05 am

Definitely E

Previous explanation by Vemuri is very good )

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lilu: Master | Next Rank: 500 Posts; Posts: 148; Joined: Wed Dec 10, 2008 5:13 pm; Location: SF, CA; Thanked: 12 times

Re: GMATPrep Bookstore

by lilu » Thu May 07, 2009 6:45 am

Vemuri wrote:IMO E.

Statement 1: Can be represented in an equation as 2P+3H=12.5. 2 variables & 1 equation, so not sufficient

Statement 2: Can be represented in an equation as 4P+6H=25 ==> 2P+3H=12.5. 2 variables & 1 equation, so not sufficient

Together also the statements are not sufficient because they both represent the same equation.

Thank you, Vemuri!
I made such a silly mistake. I thought that we'd be able to set up a second equation P+H=5 and find out the values of P and H, but I did read the question carefully: we need to find the price of P and H books,not the amounts.

The more you look, the more you see.

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