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

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

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22 Jul 2009, 12:55
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100% (02:07) 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 $20 more than buying 5 individually Current Student Joined: 18 Jun 2009 Posts: 356 Location: San Francisco Schools: Duke,Oxford,IMD,INSEAD Followers: 10 Kudos [?]: 77 [0], given: 15 Re: GMATPrep DS [#permalink] ### Show Tags 22 Jul 2009, 13:19 Let the price of set of 6 be$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

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