Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

19 Jun 2012, 07:52

3

This post received KUDOS

30

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

75% (hard)

Question Stats:

51% (04:46) correct
49% (05:33) wrong based on 477 sessions

HideShow timer Statistics

A student has decided to take GMAT and TOEFL examinations, for which he has allocated a certain number of days for preparation. On any given day, he does not prepare for both GMAT and TOEFL. How many days did he allocate for the preparation?

(1) He did not prepare for GMAT on 10 days and for TOEFL on 12 days. (2) He prepared for either GMAT or TOEFL on 14 days.

A student has decided to take GMAT and TOEFL examinations, for which he has allocated a certain number of days for preparation. On any given day, he does not prepare for both GMAT and TOEFL. How many days did he allocate for the preparation?

It's more Overlapping Sets problem than Statistics, I guess.

We have: {Total} = {GMAT } + {TOEFL} - {Both} + {Neither}. Since we are told that "on any given day, he does not prepare for both GMAT and TOEFL", then {Both} = 0, so {Total} = {GMAT } + {TOEFL} + {Neither}. We need to find {Total}

(1) He did not prepare for GMAT on 10 days and for TOEFL on 12 days --> {Total} - {GMAT } = 10 and {Total} - {TOEFL} =12. Not sufficient. (2) He prepared for either GMAT or TOEFL on 14 days --> {GMAT } + {TOEFL} = 14. Not sufficient.

(1)+(2) We have three linear equations ({Total} - {GMAT } = 10, {Total} - {TOEFL} =12 and {GMAT } + {TOEFL} = 14) with three unknowns ({Total}, {GMAT }, and {TOEFL}), so we can solve for all of them. Sufficient.

Answer: C.

Just to illustrate. Solving gives: {Total} = 18 - he allocate total of 18 days for the preparation; {GMAT } = 8 - he prepared for the GMAT on 8 days; {TOEFL} = 6 - he prepared for the TOEFL on 6 days; {Neither} = 4 - he prepared for neither of them on 4 days.

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

20 Jun 2012, 22:39

4

This post received KUDOS

1

This post was BOOKMARKED

Hi,

Using Venn diagram approach, (my favorite ) let, a = Days on which student prepares for GMAT, b = Days on which student prepares for Toefl, c = Days on which student prepares neither for GMAT nor for TOEFL,

Using (1), He did not prepare for GMAT on 10 days and for TOEFL on 12 days a+c=12 b+c=10, two equation, 3 variables. can't solve.Insufficient.

Using (2) He prepared for either GMAT or TOEFL on 14 days a+b=14. Insufficient.

Combining both (1) & (2), a+c=12 b+c=10 a+b=14, addition all three, 2(a+b+c)=36 a+b+c=18, Sufficient.

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

11 Sep 2012, 04:28

Is this a badly worded question? - it tells me that how many days of preparation has the student taken, but if he has studied for neither GMAT or TOEFL then this idle day is not a day of preparation and doesnt count.

Therefor the answer is D, both can give us the answer
_________________

If you find my post helpful, please GIVE ME SOME KUDOS!

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

06 Jan 2013, 23:16

jordanshl wrote:

Is this a badly worded question? - it tells me that how many days of preparation has the student taken, but if he has studied for neither GMAT or TOEFL then this idle day is not a day of preparation and doesnt count.

Therefor the answer is D, both can give us the answer

I thought the same too.. Could somebody please confirm?
_________________

hope is a good thing, maybe the best of things. And no good thing ever dies.

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

07 Jan 2013, 17:48

Sachin9 wrote:

jordanshl wrote:

Is this a badly worded question? - it tells me that how many days of preparation has the student taken, but if he has studied for neither GMAT or TOEFL then this idle day is not a day of preparation and doesnt count.

Therefor the answer is D, both can give us the answer

I thought the same too.. Could somebody please confirm?

I agree... the wording of this question sucks, it's not clear if the days he did not spend studying should be taken into consideration

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

07 Jan 2013, 19:01

Vaico wrote:

Sachin9 wrote:

jordanshl wrote:

Is this a badly worded question? - it tells me that how many days of preparation has the student taken, but if he has studied for neither GMAT or TOEFL then this idle day is not a day of preparation and doesnt count.

Therefor the answer is D, both can give us the answer

I thought the same too.. Could somebody please confirm?

I agree... the wording of this question sucks, it's not clear if the days he did not spend studying should be taken into consideration

what makes me worried is that this question appears in the gmatclub math book.
_________________

hope is a good thing, maybe the best of things. And no good thing ever dies.

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

26 Jan 2013, 08:52

Sachin9 wrote:

aishwarye wrote:

Can this question come in GMAT ? I doubt because i've never seen such SETs qshn ever. Whats the source pl ?

congrats on your first post.

This question will never come in GMAT.. Guaranteed. IMHO One that's floating around in internet,never :D

Thank you for the warm welcome Sachin ! I have baan a part of gmatclub since long.. Now trying to get active.. i think getting active on gmatclub will keep me focussed and help learn more !

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

26 Jan 2013, 18:34

aishwarye wrote:

Sachin9 wrote:

aishwarye wrote:

Can this question come in GMAT ? I doubt because i've never seen such SETs qshn ever. Whats the source pl ?

congrats on your first post.

This question will never come in GMAT.. Guaranteed. IMHO One that's floating around in internet,never :D

Thank you for the warm welcome Sachin ! I have baan a part of gmatclub since long.. Now trying to get active.. i think getting active on gmatclub will keep me focussed and help learn more !

yupp . . all the best!!
_________________

hope is a good thing, maybe the best of things. And no good thing ever dies.

I can only see that the correct answer is C but I don't see any of the answer choices.

This is a data sufficiency question.

The data sufficiency problem consists of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements, plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of the word counterclockwise), you must indicate whether—

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked. C. BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked. D. EACH statement ALONE is sufficient to answer the question asked. E. Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

The correct answer to this question is C: BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

28 Aug 2013, 02:03

What is the difference between following two statements: (2) He prepared for either GMAT or TOEFL on 14 days. // I considered it 14 days GMAT or 14 days TOEFL, not G + T =14. OR (2) He prepared for GMAT and TOEFL on 14 days. // this can be interpreted as G + T =14.
_________________

Piyush K ----------------------- Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison Don't forget to press--> Kudos My Articles: 1. WOULD: when to use?| 2. All GMATPrep RCs (New) Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Re: A student has decided to take GMAT and TOEFL examinations [#permalink]

Show Tags

05 May 2014, 22:20

PiyushK wrote:

What is the difference between following two statements: (2) He prepared for either GMAT or TOEFL on 14 days. // I considered it 14 days GMAT or 14 days TOEFL, not G + T =14. OR (2) He prepared for GMAT and TOEFL on 14 days. // this can be interpreted as G + T =14.

I am having the same confusion. Bunuel can you please explain how to interpret this ?

Sentence was - "He prepared for either GMAT or TOEFL on 14 days"

Why can't this be interpreted as G/T = 14 i.e. 14 days could be either for G or for T

What is the difference between following two statements: (2) He prepared for either GMAT or TOEFL on 14 days. // I considered it 14 days GMAT or 14 days TOEFL, not G + T =14. OR (2) He prepared for GMAT and TOEFL on 14 days. // this can be interpreted as G + T =14.

I am having the same confusion. Bunuel can you please explain how to interpret this ?

Sentence was - "He prepared for either GMAT or TOEFL on 14 days"

Why can't this be interpreted as G/T = 14 i.e. 14 days could be either for G or for T

"He prepared for either GMAT or TOEFL on 14 days" means that out of 14 days some were for GMAT and the rest for TOEFL. It does not mean that either all 14 were for GMAT or all 14 were for TOEFL.
_________________

Happy New Year everyone! Before I get started on this post, and well, restarted on this blog in general, I wanted to mention something. For the past several months...

It’s quickly approaching two years since I last wrote anything on this blog. A lot has happened since then. When I last posted, I had just gotten back from...

Happy 2017! Here is another update, 7 months later. With this pace I might add only one more post before the end of the GSB! However, I promised that...