Of the 60 animals on a certain farm, 2/3 are either pigs or : GMAT Data Sufficiency (DS)
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 06 Dec 2016, 10:48

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Of the 60 animals on a certain farm, 2/3 are either pigs or

Author Message
TAGS:

### Hide Tags

SVP
Joined: 16 Oct 2003
Posts: 1810
Followers: 4

Kudos [?]: 132 [2] , given: 0

Of the 60 animals on a certain farm, 2/3 are either pigs or [#permalink]

### Show Tags

22 Jan 2006, 22:59
2
KUDOS
2
This post was
BOOKMARKED
00:00

Difficulty:

65% (hard)

Question Stats:

57% (02:27) correct 43% (01:35) wrong based on 207 sessions

### HideShow timer Statistics

Of the 60 animals on a certain farm, 2/3 are either pigs or cows. How many of the animals are cows?

(1) The farm has more than twice as many cows at it has pigs.

(2) The farm has more than 12 pigs.

OPEN DISCUSSION OF THIS QUESTION IS HERE: of-the-60-animals-on-a-certain-farm-2-3-are-either-cows-or-92062.html
[Reveal] Spoiler: OA

Last edited by Bunuel on 05 Jan 2014, 05:00, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to DS forum.
Director
Joined: 09 Oct 2005
Posts: 720
Followers: 3

Kudos [?]: 23 [0], given: 0

### Show Tags

22 Jan 2006, 23:03
If it is E I will Explain
_________________

IE IMBA 2010

Manager
Joined: 02 Oct 2005
Posts: 53
Followers: 1

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

### Show Tags

22 Jan 2006, 23:14
The ans is C. This is a tricky one.

Questions stem gives us P+C=40.

1) says C=2P+r, so basically P=(40-r)/3, multiple value possible.
2) says P>12, again multiple values possible.

Combining 1) and 2), min P=13. If P is more than 13, C is more than 28 and the sum exceeds 40. So P=13, C=27.

Ans = (C).
CEO
Joined: 20 Nov 2005
Posts: 2911
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 23

Kudos [?]: 267 [0], given: 0

### Show Tags

23 Jan 2006, 01:41
Total pigs and cows = 40

St1: Could be 1, 39 or 2,38 etc etc.... INSUFF

St2: Could be 13, 27 or 14, 26 etc etc.... INSUFF

Combined:

Only case that satisfies both the statements is 13,27.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Director
Joined: 09 Oct 2005
Posts: 720
Followers: 3

Kudos [?]: 23 [0], given: 0

### Show Tags

23 Jan 2006, 09:27
ps_dahiya wrote:
Total pigs and cows = 40

St1: Could be 1, 39 or 2,38 etc etc.... INSUFF

St2: Could be 13, 27 or 14, 26 etc etc.... INSUFF

Combined:

Only case that satisfies both the statements is 13,27.

I guess we are both wrong C should be the answer
The farm has more than twice as many cows as it has pigs. Hence there could be only 13 pigs and 27 cows
_________________

IE IMBA 2010

SVP
Joined: 16 Oct 2003
Posts: 1810
Followers: 4

Kudos [?]: 132 [0], given: 0

### Show Tags

23 Jan 2006, 09:47
Here is the blunder I did. The question says "2/3 are either pigs or cows" and I thought 40 are either pigs or cows not both. How stupid?
Director
Joined: 09 Oct 2005
Posts: 720
Followers: 3

Kudos [?]: 23 [0], given: 0

### Show Tags

23 Jan 2006, 10:01
Bhai wrote:
Here is the blunder I did. The question says "2/3 are either pigs or cows" and I thought 40 are either pigs or cows not both. How stupid?

The true is born in dispute))
Bhai wish I were so stupid as you are)))
_________________

IE IMBA 2010

VP
Joined: 20 Sep 2005
Posts: 1021
Followers: 3

Kudos [?]: 34 [0], given: 0

### Show Tags

23 Jan 2006, 11:51
C...

C+P = 2/3(60) = 40.

I. C > 2P gives 40 = ( greater than 2P ) + P....INSUFF.
II. P > 12 . If P = 13, then C could be 27. If P =14, then C could be 26.INSUFF.

I + II gives

40 = greater than 2P + P ( which is greater than 12 )/
Let P =12, then 40 = (>2P) + 13...the number of cows has to be 27.
Let P =13, then 40 = (>2P) + 14..the number of cows need to be greater than 28, but then the total is greater than 40...INVALID.

Thus C = 27 and P = 13.
CEO
Joined: 20 Nov 2005
Posts: 2911
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 23

Kudos [?]: 267 [0], given: 0

### Show Tags

23 Jan 2006, 12:05
Yurik79 wrote:
ps_dahiya wrote:
Total pigs and cows = 40

St1: Could be 1, 39 or 2,38 etc etc.... INSUFF

St2: Could be 13, 27 or 14, 26 etc etc.... INSUFF

Combined:

Only case that satisfies both the statements is 13,27
.

I guess we are both wrong C should be the answer
The farm has more than twice as many cows as it has pigs. Hence there could be only 13 pigs and 27 cows

I replied C already. There is only one case when both the statements are taken together. So it means, its SUFF.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Senior Manager
Joined: 13 Jun 2005
Posts: 252
Location: Haverhill, MA
Followers: 1

Kudos [?]: 15 [0], given: 0

### Show Tags

23 Jan 2006, 13:29
Senior Manager
Joined: 11 Jan 2006
Posts: 269
Location: Chennai,India
Followers: 1

Kudos [?]: 4 [0], given: 0

### Show Tags

23 Jan 2006, 22:06
1
This post was
BOOKMARKED
watever wrote:
The ans is C. This is a tricky one.

Questions stem gives us P+C=40.

1) says C=2P+r, so basically P=(40-r)/3, multiple value possible.
2) says P>12, again multiple values possible.

Combining 1) and 2), min P=13. If P is more than 13, C is more than 28 and the sum exceeds 40. So P=13, C=27.

Ans = (C).

i missed C=2P+r --> I overlook things easily.. thats y i scored less last time.

_________________

vazlkaiye porkalam vazltuthan parkanum.... porkalam maralam porkalthan maruma

Director
Joined: 04 Oct 2005
Posts: 586
Location: Chicago
Followers: 1

Kudos [?]: 7 [0], given: 0

### Show Tags

23 Jan 2006, 22:40
2/3 are either pigs or cows means 40
a) Pigs =x Cows >2x Insuff
b)>12 pigs Insuff
Combine
and 3x<=40=>x<=13 with B we know only x=13 stands out , so remaining are cows
Intern
Joined: 24 Apr 2006
Posts: 14
Followers: 1

Kudos [?]: 14 [0], given: 0

### Show Tags

26 Jun 2006, 16:01

I did the same mistake as Bhai. I thought that we had only cow and pigs in the farm, and that we had either 40 pigs + 20 cows, or 40 cows + 20 pigs...
I guess I have to work my verbal a bit tougher then ...
Manager
Joined: 18 Oct 2013
Posts: 81
Location: India
Concentration: Technology, Finance
GMAT 1: 580 Q48 V21
GMAT 2: 530 Q49 V13
GMAT 3: 590 Q49 V21
WE: Information Technology (Computer Software)
Followers: 3

Kudos [?]: 25 [0], given: 36

Re: Of the 60 animals on a certain farm, 2/3 are either pigs or [#permalink]

### Show Tags

04 Jan 2014, 12:45
Hi

Can someone please explain why Pig+cow=40. why don't we take either pig=40 or cow=40.
Math Expert
Joined: 02 Sep 2009
Posts: 35909
Followers: 6846

Kudos [?]: 89983 [0], given: 10396

Re: Of the 60 animals on a certain farm, 2/3 are either pigs or [#permalink]

### Show Tags

05 Jan 2014, 05:01
Expert's post
1
This post was
BOOKMARKED
vikrantgulia wrote:
Hi

Can someone please explain why Pig+cow=40. why don't we take either pig=40 or cow=40.

Of the 60 animals on a certain farm, 2/3 are either pigs or cows. How many of the animals are cows?

2/3 of 60 animals are either pigs or cows. So there are total of 40 cows and pigs.

(1) The farm has more than twice as many cows as it has pigs --> $$c>2p$$ --> as $$c+p=40$$ then $$c=40-p$$ --> $$40-p>2p$$ --> $$13.3>p$$ --> $$p_{max}=13$$ and $$c_{min}=27$$. Many combinations are possible: (27,13), (28, 12), ... Not sufficient.

(2) $$p>12$$. Not sufficient

(1)+(2) $$p>12$$ but $$p_{max}=13$$, hence $$p=13$$ --> $$c=27$$. Sufficient.

OPEN DISCUSSION OF THIS QUESTION IS HERE: of-the-60-animals-on-a-certain-farm-2-3-are-either-cows-or-92062.html
_________________
Re: Of the 60 animals on a certain farm, 2/3 are either pigs or   [#permalink] 05 Jan 2014, 05:01
Similar topics Replies Last post
Similar
Topics:
4 A farmer has a total of 60 pigs, cows, and horses on his farm. How 4 07 Oct 2015, 05:29
8 If a certain animated cartoon consists of a total of 17,280 4 13 Dec 2012, 04:41
22 Of the 60 animals on a certain farm, 2/3 are either pigs or 1 08 Apr 2012, 00:39
4 Of the 60 animals on a certain farm, 2/3 are either pigs or 3 16 Nov 2011, 13:21
139 Of the 60 animals on a certain farm, 2/3 are either cows or 59 11 Oct 2009, 23:59
Display posts from previous: Sort by