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GMAT Diagnostic Test Question 23 [#permalink]
 06 Jun 2009, 23:03
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GMAT Diagnostic Test Question 23Field: word problems (overlapping sets) Difficulty: 700
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]
02 Jul 2009, 06:46
Explanation:
Official Answer: EThere 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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Re: GMAT Diagnostic Test Question 23 [#permalink]
22 Oct 2009, 12:06
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, 20:06, edited 1 time in total.
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Re: GMAT Diagnostic Test Question 23 [#permalink]
22 Oct 2009, 12:17
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 23Field: word problems (overlapping sets) Difficulty: 700
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]
22 Oct 2009, 12:30
I got E too, this appears as an under medium difficulty level.
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Re: GMAT Diagnostic Test Question 23 [#permalink]
07 Nov 2009, 08:24
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]
19 Dec 2009, 15:25
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]
09 Feb 2010, 08:09
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Re: GMAT Diagnostic Test Question 23 [#permalink]
02 Apr 2010, 17:30
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]
25 Apr 2010, 08:44
 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]
25 Apr 2010, 08:48
careless mistakes kill us .
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Re: GMAT Diagnostic Test Question 23 [#permalink]
25 Apr 2010, 11:03
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]
12 Sep 2010, 09:28
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]
12 Sep 2010, 11:28
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]
12 Sep 2010, 22:24
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]
03 Jan 2011, 21:18
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]
18 Aug 2011, 12:50
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]
15 Nov 2011, 18:23
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]
20 Dec 2012, 16:27
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.
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Re: GMAT Diagnostic Test Question 23
[#permalink]
20 Dec 2012, 16:27
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