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# What percent of the students at Jefferson High School study

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Manager
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What percent of the students at Jefferson High School study [#permalink]

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23 Mar 2013, 12:32
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71% (01:46) correct 29% (00:35) wrong based on 282 sessions

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What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.
[Reveal] Spoiler: OA
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Re: What percent of the students at Jefferson High School study [#permalink]

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24 Mar 2013, 00:27
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thinktank wrote:
What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.

Hi,

Let us assume there are 100 students then, we have

Total= No. of students that study French (F) + No. of Students that study (S) - no. of students that study both (B) + Neither (N)

Thus we have

100= F+S-B+N
St 1 gives us F only so not sufficient

So, Option A and D ruled out

St 2 ----> F+ N = 40

Alone not sufficient, so B ruled out

Combining we get S-B = 60, We still cannot find out S and B therefore insufficent and hence ans E

Thanks
Mridul
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Re: What percent of the students at Jefferson High School study [#permalink]

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24 Mar 2013, 02:48
thinktank wrote:
What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.

Similar question to practice:
in-jefferson-school-300-students-study-french-or-spanish-or-87885.html

Hope it helps.
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Re: What percent of the students at Jefferson High School study [#permalink]

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09 Apr 2014, 05:51
Hello from the GMAT Club BumpBot!

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Re: What percent of the students at Jefferson High School study [#permalink]

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06 May 2014, 01:26
WoundedTiger wrote:
thinktank wrote:
What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.

Hi,

Let us assume there are 100 students then, we have

Total= No. of students that study French (F) + No. of Students that study (S) - no. of students that study both (B) + Neither (N)

Thus we have

100= F+S-B+N
St 1 gives us F only so not sufficient

So, Option A and D ruled out

St 2 ----> F+ N = 40

Alone not sufficient, so B ruled out

Combining we get S-B = 60, We still cannot find out S and B therefore insufficent and hence ans E

Thanks
Mridul

During GMAT time under time constraint , if we go by the simple logical question of - no information given about the possibility of a student studying either language , wont this itself give the option 'E'
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Re: What percent of the students at Jefferson High School study [#permalink]

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06 May 2014, 02:01
himanshujovi wrote:
WoundedTiger wrote:
thinktank wrote:
What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.

Hi,

Let us assume there are 100 students then, we have

Total= No. of students that study French (F) + No. of Students that study (S) - no. of students that study both (B) + Neither (N)

Thus we have

100= F+S-B+N
St 1 gives us F only so not sufficient

So, Option A and D ruled out

St 2 ----> F+ N = 40

Alone not sufficient, so B ruled out

Combining we get S-B = 60, We still cannot find out S and B therefore insufficent and hence ans E

During GMAT time under time constraint , if we go by the simple logical question of - no information given about the possibility of a student studying either language , wont this itself give the option 'E'

Well...under time constraint and depending upon on which question no. I would mark C or E and move on

I am bit old school and hence find it easier to put information on paper and avoid silly mistakes

Posted from my mobile device
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Re: What percent of the students at Jefferson High School study [#permalink]

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03 Nov 2014, 23:15
thinktank wrote:
What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.

Another reason, why the answer is E is, we don't know from either of the choices that what percent of students don't study any of the two languages at all.
Bunuel - Please correct me if I am wrong.
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Re: What percent of the students at Jefferson High School study [#permalink]

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04 Nov 2014, 04:55
Thoughtosphere wrote:
thinktank wrote:
What percent of the students at Jefferson High School study French but not Spanish?

(1) 30% of all students at Jefferson High School study French.
(2) 40% of all students at Jefferson High School do not study Spanish.

Another reason, why the answer is E is, we don't know from either of the choices that what percent of students don't study any of the two languages at all.
Bunuel - Please correct me if I am wrong.

Yes, you are right. If we knew what percent of all students does not study any of the two languages we would be able to answer the question.
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Re: What percent of the students at Jefferson High School study [#permalink]

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13 Feb 2016, 10:54
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: What percent of the students at Jefferson High School study   [#permalink] 13 Feb 2016, 10:54
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