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by B166418 » Wed Nov 07, 2012 8:12 pm
How many of the 42 people in group are employed students

(1) 29 of the 42 people are employed
(2) 24 of 42 people are students


A Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C Both statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
D EACH statement ALONE is sufficient.
E Statements (1) and (2) TOGETHER are NOT sufficient.
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by FLUID » Wed Nov 07, 2012 8:42 pm
B166418 wrote:How many of the 42 people in group are employed students

(1) 29 of the 42 people are employed
(2) 24 of 42 people are students


A Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C Both statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
D EACH statement ALONE is sufficient.
E Statements (1) and (2) TOGETHER are NOT sufficient.

E Statements (1) and (2) TOGETHER are NOT sufficient.
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by B166418 » Wed Nov 07, 2012 8:44 pm
Dude ...could you pls explain

I answered it as C coz I got answer as 11
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by FLUID » Wed Nov 07, 2012 8:53 pm
B166418 wrote:Dude ...could you pls explain

I answered it as C coz I got answer as 11
There is no where in the options it talks about

1) Number students who are employed
2) Number of Non students who are employed
3) Number of students who are not employed.
4) Number of Non students who are not employed

I mean, how do you define a relationship. Can you explain how do you come to conclusion as 11.
can you please explain so that i can correct my self.
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by B166418 » Wed Nov 07, 2012 8:56 pm
but you got right answers
OA is E .. so just explain little bit
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by FLUID » Wed Nov 07, 2012 9:12 pm
B166418 wrote:but you got right answers
OA is E .. so just explain little bit
Draw a matrix like below

Employed Non Employed
Student ? 24

Non-Student 18
29 13 42

If you look at the above matrix, There is no value defined in the both options about

1) Number students who are employed
2) Number of Non students who are employed
3) Number of students who are not employed.
4) Number of Non students who are not employed


we can only interpret

Total students employed and Non employed are 24
Total non students employed and Non employed are 18
Total employed including student and non student are 29
Total Non Employed including student and non student are 13
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by B166418 » Wed Nov 07, 2012 9:32 pm
oh I took everyone is either student or employed or both
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by Brent@GMATPrepNow » Thu Nov 08, 2012 7:24 am
I should point out that this question (and other questions involving overlapping sets) can be solved using a technique called the Double Matrix (or Double Set Matrix). For more information about this technique and some additional practice questions, check out these 3 BTG articles:

- https://www.beatthegmat.com/mba/2011/05/ ... question-1
- https://www.beatthegmat.com/mba/2011/05/ ... question-2
- https://www.beatthegmat.com/mba/2011/05/ ... question-3

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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