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How many of a group of 42 are employed students? 1. 29 of

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How many of a group of 42 are employed students? 1. 29 of [#permalink] New post 07 Feb 2007, 07:26
How many of a group of 42 are employed students?
1. 29 of the 42 are employed
2. 24 of the 42 are students

I picked oa c.

if n is the combined employed and students then thru veign dia

29 -n +n+ 24-n =42
53 -n =42
n=13
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 [#permalink] New post 07 Feb 2007, 07:36
Indeed the answer is C both the conditions are needed to get the value of n.
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Re: gmatprep [#permalink] New post 07 Feb 2007, 07:49
lali wrote:
How many of a group of 42 are employed students?
1. 29 of the 42 are employed
2. 24 of the 42 are students

I picked oa c.

if n is the combined employed and students then thru veign dia

29 -n +n+ 24-n =42
53 -n =42
n=13


This is a good time to ask you guys' opinions.

If I were picky, I would assume that not all 42 people are employed students. Then the answer is E.

If the question stated clearly that all 42 people are employed student, I would choose C. for the answer.

What do you guys think?

:cry:
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 [#permalink] New post 07 Feb 2007, 08:28
Interesting... we know employed students are 42 and we condisered that as the universal set... But we don't have any information about not employed or not students meaning there could be people who are neither students nor employed in that case the value of universal set will change but the intersection of students and employed would still remain the same I would think...
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Last edited by amorpheus on 07 Feb 2007, 11:37, edited 1 time in total.
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 [#permalink] New post 07 Feb 2007, 11:27
I would say E

It is a group of employed, unemployed, students, and those who are not students.

S1:29 are employed, so 13 are unemp. -insuff
S2:24 are st., so 18 are not students -insuff
Together: insuff 'cause there are no info about emp who are students. There could be unemp. who are students and stu. who are unemp.
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 [#permalink] New post 07 Feb 2007, 11:39
Sumithra wrote:
I would say E

It is a group of employed, unemployed, students, and those who are not students.

S1:29 are employed, so 13 are unemp. -insuff
S2:24 are st., so 18 are not students -insuff
Together: insuff 'cause there are no info about emp who are students. There could be unemp. who are students and stu. who are unemp.


I tend to disagree... we are given that set A (employed) = 29 and set B (students) = 24 and we are ask to find the intersection (employed students) of both we dont care about A-B at all in this case.

Iali, can you verify the answer.
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 [#permalink] New post 07 Feb 2007, 14:28
Of course, we are asked for A intersection B.

But we do not have suff details to ans how many. It could be anywhere between 11 and 24.

Say, for eg, all students are empl. Then ans is 24.
Worst case scenario, if all unempl. are students then ans is 24-13=11.

So insuff.
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 [#permalink] New post 07 Feb 2007, 14:39
Sumithra wrote:
Of course, we are asked for A intersection B.

But we do not have suff details to ans how many. It could be anywhere between 11 and 24.

Say, for eg, all students are empl. Then ans is 24.
Worst case scenario, if all unempl. are students then ans is 24-13=11.

So insuff.


But that's what it is clearly said that the number 42 has all the employed students... so I think we have to just think of that but I understand that if that was not the case then it could be a question mark :) and hence the answer would be E
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 [#permalink] New post 07 Feb 2007, 14:47
how do we know the group only consists of students???

I dont think this question is valid...what do you fellas think?
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 [#permalink] New post 07 Feb 2007, 14:48
The Q says "How many of a group of 42 are employed students?"
If it says all 42 are empl. students, then 42 is the ans. Then what are we looking for? Why do we need S1 and S2?
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 [#permalink] New post 07 Feb 2007, 14:56
Sumithra wrote:
The Q says "How many of a group of 42 are employed students?"
If it says all 42 are empl. students, then 42 is the ans. Then what are we looking for? Why do we need S1 and S2?


I interpret the question as saying that union of students and employed is 42 now find out the intersection....
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 [#permalink] New post 07 Feb 2007, 19:11
amorpheus wrote:
Sumithra wrote:
The Q says "How many of a group of 42 are employed students?"
If it says all 42 are empl. students, then 42 is the ans. Then what are we looking for? Why do we need S1 and S2?


I interpret the question as saying that union of students and employed is 42 now find out the intersection....


I still think the question is vague. :?

To be honest, the question itself is simple but the wording is horrible.

I don't think this will be a good GMAT question.
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 [#permalink] New post 08 Feb 2007, 05:39
i agree the wording does confuse u. the oa is e.
  [#permalink] 08 Feb 2007, 05:39
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