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GMAT Diagnostic Test Question 22

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GMAT Diagnostic Test Question 22 [#permalink]

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06 Jun 2009, 22:03
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GMAT Diagnostic Test Question 22
Field: word problems (overlapping sets)
Difficulty: 650

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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Last edited by Bunuel on 06 Oct 2013, 23:23, edited 3 times in total.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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02 Jul 2009, 05:46
Explanation:

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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Last edited by bb on 29 Sep 2013, 10:55, edited 1 time in total.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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22 Oct 2009, 11:06
total --> 100
female --> 60 male --> 40
female smokers --> 10 therefore female non smokers ---> 50
male smokers -->20 therefore male non smokers --> 40 - 20 = 20.

Now the tricky part.. its the percentage of men who smoked, which is = 20/40 = 50%
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Last edited by urchin on 02 Apr 2010, 19:06, edited 1 time in total.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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22 Oct 2009, 11:17
I don't think this is a 700-level question. I think it's more of a 550 - 600.

bb wrote:
GMAT Diagnostic Test Question 23
Field: word problems (overlapping sets)
Difficulty: 700
 Rating:

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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Re: GMAT Diagnostic Test Question 23 [#permalink]

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22 Oct 2009, 11:30
I got E too, this appears as an under medium difficulty level.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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07 Nov 2009, 07:24
But please don't remove it from the list... people will start dropping dead of brain fatigue if such Qs are not spread within the other 700s
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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19 Dec 2009, 14:25
oh, I made a stupid mistake on this one. I thought it's asking what is the % of men non-smoker surveyed. Should had read the question more clearly.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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09 Feb 2010, 07:09
I made the same mistake and got ans as 20....
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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02 Apr 2010, 16:30
Usually, i find it more comfortable to use chats for sets and mixtures related problems.

M W

SMOKERS 20 10

NONSMOKERS 20 50
==================================
40 60
==================================
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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25 Apr 2010, 07:44
Damn.

Due to apparent simplicity of the problem, I even did not read the question carefully. thus I have selected B as well.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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25 Apr 2010, 07:48
careless mistakes kill us .
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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25 Apr 2010, 10:03
msand wrote:
:-) careless mistakes kill us .

agree 1000%.
I think we have to pay very close attention to questions if they look very simple.
Sometimes, doing 600 level questions, I perform the calculations mentally, without scratching anything, and boom! I arrive to smth like this: 3+2=6 or 3*2=5
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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12 Sep 2010, 08:28
you're kidding me. This is 700? i solved it while reading it. i am just starting studies, if it's that easy then i am all set
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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12 Sep 2010, 10:28
score780 wrote:
you're kidding me. This is 700? i solved it while reading it. i am just starting studies, if it's that easy then i am all set

obviously not a 700 category question.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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12 Sep 2010, 21:24
I also believe it's a quite easy question! I made this while reading the question.

Explanation:

Total =100
Women = 60
So, Men = 40
Women smokers = 10 (I think this info. is of no use!)
Men Smokers = 20
So, Non Smoker Men = 40 - 20 = 20

%age of men who smoke = 20/40 = 50% = E

Quite a simple problem
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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03 Jan 2011, 20:18
Sigh, The carelessness has got me again. I think when looked at alone, it is not a hard question but when you couple it with the real toughies you tend to get distracted and miss the easy ones like these. Good test of alertness
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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18 Aug 2011, 11:50
Agreed with the posters. This can only be the first question on the test.
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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15 Nov 2011, 17:23
I got tricked by the question,. i thin i need to be more focused and concentrated
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Re: GMAT Diagnostic Test Question 23 [#permalink]

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20 Dec 2012, 15:27
Perhaps I'm getting lucky. I doubt this is a 700+ question.

100*.6 = 60; so Women = 60 and Men = 40. If 20 of 40 men are smoker, then that means that 50% all men are smokers.
Re: GMAT Diagnostic Test Question 23   [#permalink] 20 Dec 2012, 15:27
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