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# A store sells chairs individually or in sets of 6. The store

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Director
Joined: 29 Aug 2005
Posts: 808
A store sells chairs individually or in sets of 6. The store  [#permalink]

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22 Jul 2009, 12:55
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:07) correct 0% (00:00) wrong based on 2 sessions

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A store sells chairs individually or in sets of 6. The store charges less for purchasing a set of 6 chairs than for purchasing 6 chairs individually. How much does the store charge for purchasing a set of 6 chairs?
a. Buying a set of 6 is 10% less than buying 6 individually
b. Buying a set of 6 is \$20 more than buying 5 individually

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Senior Manager
Joined: 18 Jun 2009
Posts: 348
Location: San Francisco

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22 Jul 2009, 13:19
Let the price of set of 6 be \$y and each of the chair be \$x

Stmt 1 ) Set of 6 is 10% less than 6 individual
therefore x = (0.9) * 6y

x = 5.4y .... 1

Insuff

Stmt2) x = \$20 + 5y .... 2

Insuff

Combing them
use the value of x got from 1 in 2

5.4y = \$20 + 5 y

Solve for y and then x

therefore suff

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If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Re: GMATPrep DS &nbs [#permalink] 22 Jul 2009, 13:19
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