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Vithal
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DS: Survey 11 Jun 2005, 10:41
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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tkirk32
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DS: Survey 11 Jun 2005, 12:43
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I think its E.

Reasoning.

(1)

Tells us that 60 people consists of the following

Favorable for both M and N, Favorable to M, Favorable to N, Unsure to both, unsure to M, unsure to N.

(2)

Does not help us narrow anything down

(1) and (2) together:

I think we still have the problem of figuring out who voted for MvN and also was unsure of the other candidate.

I hate Ven diagram problems.
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sparky
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DS: Survey 11 Jun 2005, 12:47
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seems like A.

1) Fm + Mn - Fmn + 40 (everyone else) = 100
Fmn = -100 + 40 + 70 = 10
sufficient

2) insuff, we need some extra info on 'not sure' group

I am not really sure how to do it fast. It would be really nice if someone write down a complete solution to this
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tkirk32
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DS: Survey 11 Jun 2005, 13:22
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that was my first answer to the problem sparky.

but arent you forgetting to factor in the "unsures" into the first equation.

We have people who could go Fm and Un.

?
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sparky
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DS: Survey 11 Jun 2005, 13:30
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tkirk32
that was my first answer to the problem sparky.

but arent you forgetting to factor in the "unsures" into the first equation.

We have people who could go Fm and Un.

?
Show more


As long as we know favourable vs everything else and the total number of people we are set. They also can drink coffee or tea but it's included in everything else.
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DS: Survey 11 Jun 2005, 13:34
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I would say E as neither of the statements gives any information about the people who said 'not sure'
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FN
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DS: Survey 11 Jun 2005, 18:01
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I am confused....

Vithal where did you get this question?


I would go with C..

though E comes to mind....when I am confused...my strategy on exam day is pick E when I am confused by a DS question.
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DS: Survey 11 Jun 2005, 20:45
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I agree with Sparky that it is A.

(1) 40 people didn't favor either M or N. ie., 60 people either favored M or favored N. 30 people favored N. So 60-30=30 people favored M but not N and 10 people favored both M and N. Sufficient.

(2) 10 people unfavored both M and N.
FM+FN-FMN+UFM+UFN-UFMN+USM+USN-USMN=200
40+30-FMN+20+35-UFMN+40+35-USMN=200
We know UFMN=10, but don't know USMN, so we can't get FMN.
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Vithal
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DS: Survey 11 Jun 2005, 21:02
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I personally rate this as a toughie for GMAT atleast!

here is the solution for the benefit of others: (Sparky and Hong never go wrong)
Attachments

solution.JPG
solution.JPG [ 24.58 KiB | Viewed 1195 times ]

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tarungmat
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got to be A.

Logic as spaky has stated.



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