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DS- GMAT Prep

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Intern
Joined: 21 Apr 2006
Posts: 18
Location: San Francisco, CA
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Kudos [?]: 0 [0], given: 0

DS- GMAT Prep [#permalink]  21 Jun 2006, 21:42
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Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
I understand that one does not need to solve for the exact value of DS questions but I'm not sure how one would go about solving this particular question. Thoughts?

Thanks,
Tru
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Director
Joined: 16 Aug 2005
Posts: 947
Location: France
Followers: 1

Kudos [?]: 10 [0], given: 0

x + y = 4000 ...from (1)
3x + 5y = 15,000 ...from (2)

Hence C
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I believe its yogurt!

VP
Joined: 15 Jun 2006
Posts: 1124
Schools: Chicago Booth
Followers: 4

Kudos [?]: 40 [0], given: 0

C

(Fx5)+((4000-F)x3)=15000
5F+12000-3F=15000
2F=3000
F=1500
Intern
Joined: 21 Apr 2006
Posts: 18
Location: San Francisco, CA
Followers: 0

Kudos [?]: 0 [0], given: 0

I was thrown off by the "average" being in there. I thought one needed hard numbers to solve this equation. Guess not.

Thanks for the input

-Tru
VP
Joined: 02 Jun 2006
Posts: 1267
Followers: 2

Kudos [?]: 42 [0], given: 0

Given # of books sold = 15000

S1: Given # of attendees = 4000; Not Sufficient.
S2: Given 3m+5f = 15000; Need another equation to solve this

S1 & S2 : m+f = 4000, 3m+5f =15000 Can Solve. Sufficient.

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