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# 22) If a carton containing a dozen mirrors is dropped, which

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22) If a carton containing a dozen mirrors is dropped, which [#permalink]

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09 Nov 2008, 14:12
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22) If a carton containing a dozen mirrors is dropped, which of the following cannot be the ratio of broken mirrors to unbroken mirrors?

(a) 2:1
(b) 3:1
(c) 3:2
(d) 1:1
(e) 7:5
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Director
Joined: 29 Aug 2005
Posts: 877
Followers: 9

Kudos [?]: 334 [1] , given: 7

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09 Nov 2008, 15:34
1
KUDOS
Should be C.
Sum of the x:y relationships should add up to 12 or to the factor of 12:
(a) 2:1 --meaning 8b:4ub
(b) 3:1 --9b:3ub
(c) 3:2 --doesn't work
(d) 1:1 -- 6b:6ub
(e) 7:5 -- 7b:5ub

Last edited by seofah on 09 Nov 2008, 16:40, edited 1 time in total.
SVP
Joined: 05 Jul 2006
Posts: 1526
Followers: 5

Kudos [?]: 259 [0], given: 40

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09 Nov 2008, 16:34
GMAT TIGER wrote:
22) If a carton containing a dozen mirrors is dropped, which of the following cannot be the ratio of broken mirrors to unbroken mirrors?

(a) 2:1
(b) 3:1
(c) 3:2
(d) 1:1
(e) 7:5

12/3 = 4 ..OK

12/4 = 3....OK

12/5.......NOT OK........c
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Joined: 28 Dec 2004
Posts: 3385
Location: New York City
Schools: Wharton'11 HBS'12
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Kudos [?]: 272 [0], given: 2

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09 Nov 2008, 17:07
I went with C as well..

I realized that 3:2 =5 and 5 is not a factor or multiple of 12..so it cant be C
SVP
Joined: 29 Aug 2007
Posts: 2492
Followers: 67

Kudos [?]: 709 [0], given: 19

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09 Nov 2008, 21:18
GMAT TIGER wrote:
22) If a carton containing a dozen mirrors is dropped, which of the following cannot be the ratio of broken mirrors to unbroken mirrors?

(a) 2:1
(b) 3:1
(c) 3:2
(d) 1:1
(e) 7:5

OA is C.

Thanks everybody..
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Re: PS   [#permalink] 09 Nov 2008, 21:18
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