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# George owns twelve audio compact discs. If he takes two of them

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Status: Chasing my MBB Dream!
Joined: 29 Aug 2012
Posts: 1095
Location: United States (DC)
WE: General Management (Aerospace and Defense)
George owns twelve audio compact discs. If he takes two of them  [#permalink]

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08 Oct 2014, 04:27
1
00:00

Difficulty:

5% (low)

Question Stats:

83% (00:35) correct 17% (00:53) wrong based on 59 sessions

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George owns twelve audio compact discs. If he takes two of them to play on an upcoming car trip, how many different pairs of compact discs could he choose?

(A) 144
(B) 132
(C) 72
(D) 66
(E) 36

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MBA, Class of 2020,
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Joined: 02 Sep 2009
Posts: 60727
Re: George owns twelve audio compact discs. If he takes two of them  [#permalink]

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08 Oct 2014, 04:31
Gnpth wrote:
George owns twelve audio compact discs. If he takes two of them to play on an upcoming car trip, how many different pairs of compact discs could he choose?

(A) 144
(B) 132
(C) 72
(D) 66
(E) 36

$$C^2_{12}=66$$.

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Re: George owns twelve audio compact discs. If he takes two of them   [#permalink] 08 Oct 2014, 04:31
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