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Of the 60 animals in a farm 2/3rd are either pigs or cows.

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Director
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Of the 60 animals in a farm 2/3rd are either pigs or cows. [#permalink] New post 28 Mar 2008, 22:14
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Of the 60 animals in a farm 2/3rd are either pigs or cows. How many are cows?

A) Farm has twice as many cows as pigs

B) There are more than 12 pigs in the farm.
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Re: GMAT PREP Problem : DS ( Animals) [#permalink] New post 29 Mar 2008, 08:57
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bhatiagp wrote:
Of the 60 animals in a farm 2/3rd are either pigs or cows. How many are cows?

A) Farm has twice as many cows as pigs
B) There are more than 12 pigs in the farm.


either cows or pigs = 2/3 (60) = 40

A: c = 2p
c+p = 40
2p+p = 40
3p = 40
p = 40/3 = 13.33
so 13 and suff.

B: p>12
p could be 13, or 14 or 39.
nsf..


A.
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Re: GMAT PREP Problem : DS ( Animals) [#permalink] New post 16 Apr 2008, 07:43
I'm clearly missing something...

We know that pigs+cows=40, right?

From statement 1, it should be 26 2/3 cows and 13 1/3 pigs, as stated by GMAT TIGER.

How can we have fractions of these animals? Is the OA really [C]?

Does the GMAT include questions like this that don't really make sense? I must be missing a key factor in this problem...

Please help! :roll:
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Re: GMAT PREP Problem : DS ( Animals) [#permalink] New post 16 Apr 2008, 08:51
How do we know the farm only has pigs and cows? Something must be missing in the question.
Re: GMAT PREP Problem : DS ( Animals)   [#permalink] 16 Apr 2008, 08:51
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