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Set Theory

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niksdoon
 Post subject: Set Theory
 Post Posted: Tue Apr 27, 2010 6:10 am 
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Students


Posts: 10
In a school, 70% teach Science, 64% Economics, and 60% teach English. Atleast 40% of those who teach English also teach either science or Economics. How many of the teachers teach atleast 2 or 3 of the subject.
1. 50% of the teachers teach all the 3 subjects.
2. atleast 20% of the teachers who teach Science also teach Economics.

IMO it should be A but would like to have your opinion.
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parthatayi
 Post subject: Re: Set Theory
 Post Posted: Mon May 03, 2010 4:36 am 
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Course Students


Posts: 40
niksdoon wrote:
In a school, 70% teach Science, 64% Economics, and 60% teach English. Atleast 40% of those who teach English also teach either science or Economics. How many of the teachers teach atleast 2 or 3 of the subject.
1. 50% of the teachers teach all the 3 subjects.
2. atleast 20% of the teachers who teach Science also teach Economics.

IMO it should be A but would like to have your opinion.


What is OA.I think the OA is E.
As such questions consume time,I feel we shall make a guess.The absolute answer cannot be obtained.But I think 60% of the teachers teach atleast 2 or 3 subjects.
Please let us know the OA.

Thanks and Regards,
Partha.
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akhp77
 Post subject: Re: Set Theory
 Post Posted: Wed May 05, 2010 4:20 am 
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Students


Posts: 114
What is the source of the problem?
Is anything missing in this problem?
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jnelson0612
 Post subject: Re: Set Theory
 Post Posted: Sun Nov 28, 2010 2:54 pm 
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ManhattanGMAT Staff


Posts: 1857
Please provide the original answer and the source of this problem.

_________________
Jamie Nelson
ManhattanGMAT Instructor
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