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# Warehouse

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Manager
Affiliations: Beta Gamma Sigma
Joined: 14 Aug 2008
Posts: 204
Schools: Harvard, Penn, Maryland

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25 May 2009, 06:54
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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to furnish a room in a model home, an interior decorator is to select 2 chairs and 2 tables from a collection of chairs and tables in a warehouse that are all different from each other. If there are 5 chairs and 150 different possible combinations possible, how many tables are there?

A) 6
B) 8
C) 10
D) 15
E) 30

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Senior Manager
Joined: 08 Jan 2009
Posts: 310

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25 May 2009, 07:01
5C2 * nC2 = 150

solving n ( n-1) = 30

n2 - n -30 = 0

so (n-6)( n+5) = 0

n = -5,6 n cant be -ve

so n=6

So Ans.A

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

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

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Re: Warehouse &nbs [#permalink] 25 May 2009, 07:01
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