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# In a sample of college students, 40 percent are third year

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Director
Joined: 01 May 2007
Posts: 794

Kudos [?]: 370 [2], given: 0

In a sample of college students, 40 percent are third year [#permalink]

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30 Jan 2008, 18:29
2
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Difficulty:

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Question Stats:

100% (01:24) correct 0% (00:00) wrong based on 9 sessions

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In a sample of college students, 40 percent are third year
students and 70 percent are not second-year
students. What fraction of those students who are not
third-year students are second-year students?
(A) 3/4
(B) 2/3
(C) 4/7
(D) 1/2
(E) 3/7

Kudos [?]: 370 [2], given: 0

Senior Manager
Joined: 20 Dec 2004
Posts: 251

Kudos [?]: 110 [2], given: 0

Re: PS: Gmat Paper test [#permalink]

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30 Jan 2008, 19:35
2
KUDOS
jimmyjamesdonkey wrote:
In a sample of college students, 40 percent are third year
students and 70 percent are not second-year
students. What fraction of those students who are not
third-year students are second-year students?
(A) 3/4
(B) 2/3
(C) 4/7
(D) 1/2
(E) 3/7

total - 100
TY - 40
FY + TY = 70 => FY = 30 => SY = 30
SY/(FY+SY) = 30/60 = 1/2

Ans D

Very good question +1. I was not able to crack it in 2 mins....
_________________

Stay Hungry, Stay Foolish

Kudos [?]: 110 [2], given: 0

Director
Joined: 01 May 2007
Posts: 794

Kudos [?]: 370 [1], given: 0

Re: PS: Gmat Paper test [#permalink]

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30 Jan 2008, 20:19
1
KUDOS
Correct, I used a table to solve this.

Kudos [?]: 370 [1], given: 0

Intern
Joined: 03 Mar 2007
Posts: 31

Kudos [?]: 6 [1], given: 0

Re: PS: Gmat Paper test [#permalink]

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31 Jan 2008, 15:39
1
KUDOS
Pretty straight forward: always use a total of 100

40% [u]are[/u] 3rd years = 40 students means the remaining 60 are 2nd year students

70% [u]are not[/u] 2nd years = 30 students

Not 3rd years = 60 and 2nd years = 30 students

= 30 / 60 = 1/2

Kudos [?]: 6 [1], given: 0

Re: PS: Gmat Paper test   [#permalink] 31 Jan 2008, 15:39
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