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GRE Math Challenge #35-2/3 of the number of women attending
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09 Sep 2014, 01:18
09 Sep 2014, 01:18
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Question Stats:
82% (01:33) correct
17% (02:04) wrong based on 29 sessions
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If 2/3 of the number of women attending a certain dance is equal to 1/2 of the number of men attending,what fraction of those attending are women?
A. 2/5
B. 3/7
C. 5/7
D. 3/4
E. 5/6
A. 2/5
B. 3/7
C. 5/7
D. 3/4
E. 5/6
Re: GRE Math Challenge #35-2/3 of the number of women attending
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18 Jul 2018, 13:04
18 Jul 2018, 13:04
sandy wrote:
If 2/3 of the number of women attending a certain dance is equal to 1/2 of the number of men attending,what fraction of those attending are women?
A. 2/5
B. 3/7
C. 5/7
D. 3/4
E. 5/6
A. 2/5
B. 3/7
C. 5/7
D. 3/4
E. 5/6
Let the number of women attending the dance = x
the number of men attending the dance = y
As per the question
(2/3)x = (1/2)y
4x = 3y
x/y = 3/4
Question :
men / w +m
3 /(4+3)
= 3 /7 .
The best answer is B.
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Re: GRE Math Challenge #35-2/3 of the number of women attending
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11 Sep 2021, 06:25
11 Sep 2021, 06:25
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sandy wrote:
If 2/3 of the number of women attending a certain dance is equal to 1/2 of the number of men attending, what fraction of those attending are women?
A. 2/5
B. 3/7
C. 5/7
D. 3/4
E. 5/6
A. 2/5
B. 3/7
C. 5/7
D. 3/4
E. 5/6
Let w = # of women
Let m = # of men
2/3 of the number of women attending a certain dance is equal to 1/2 of the number of men attending
We can write: (2/3)w = (1/2)m
Rewrite as: 2w/3 = m/2
Cross multiply to get: 4w = 3m
Divide both sides of the equation by m to get: 4w/m = 3
Divide both sides of the equation by 4 to get: w/m = 3/4
This tells us that the ratio of women to men is 3 to 4.
In other words, for every 7 attendees, 3 are women and 4 are men.
In other words, 3/7 of the attendees are women.
Answer: B
