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D01-22

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Math Expert
Joined: 02 Sep 2009
Posts: 47110

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16 Sep 2014, 00:12
00:00

Difficulty:

15% (low)

Question Stats:

67% (00:33) correct 33% (00:25) wrong based on 166 sessions

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Out of 100 people surveyed, 60 were women. If 10 were smoking women and 20 were smoking men, what percentage of men surveyed were non-smokers?

A. 10
B. 20
C. 30
D. 40
E. 50

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Math Expert
Joined: 02 Sep 2009
Posts: 47110

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16 Sep 2014, 00:12
Official Solution:

Out of 100 people surveyed, 60 were women. If 10 were smoking women and 20 were smoking men, what percentage of men surveyed were non-smokers?

A. 10
B. 20
C. 30
D. 40
E. 50

There were $$100 - 60 = 40$$ men surveyed. We further read that 20 men were smokers. Thus $$40-20=20$$ men were non-smokers. We have enough information to answer the question. $$\frac{40 - 20}{40} = 50%$$ of men surveyed were non-smokers. Note that the question stem gives us some redundant information about how many women were smokers.

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Intern
Joined: 16 Sep 2014
Posts: 3

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19 Dec 2014, 06:43
pretty easy mate
Intern
Joined: 20 Mar 2013
Posts: 11
GMAT 1: 570 Q46 V23
GMAT 2: 620 Q47 V28

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05 Jan 2015, 04:02
it's always wise to carefully read what the question is asking for, if it had been my first time answering this question then i too would have have answered 20%
Manager
Joined: 09 Oct 2016
Posts: 89
Location: United States
GMAT 1: 740 Q49 V42
GPA: 3.49

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20 Aug 2017, 11:22
oof, did not read clearly. Fell for the easy trap
Intern
Joined: 20 Aug 2017
Posts: 39
Location: United States (FL)
Schools: Stanford '20 (D)
GMAT 1: 750 Q49 V42
GPA: 3.4

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28 Aug 2017, 18:08
1
I would avoid questions that assume that men and women are the only genders, in this day and age, since some people identify themselves as non-gendered or other gendered. It would be clearer/more accurate if the item was stated as "Out of 100 men and women surveyed..." or "Out of 100 people surveyed, 60 were women and 40 were men."
Re: D01-22 &nbs [#permalink] 28 Aug 2017, 18:08
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D01-22

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