GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Feb 2019, 14:07

Close

GMAT Club Daily Prep

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.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Online GMAT boot camp for FREE

     February 21, 2019

     February 21, 2019

     10:00 PM PST

     11:00 PM PST

    Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.
  • Free GMAT RC Webinar

     February 23, 2019

     February 23, 2019

     07:00 AM PST

     09:00 AM PST

    Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT

At the elite university, 500 students study Computer Science

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Intern
Intern
avatar
Joined: 04 Jun 2013
Posts: 2
At the elite university, 500 students study Computer Science  [#permalink]

Show Tags

New post Updated on: 05 Aug 2013, 06:59
1
9
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

66% (01:42) correct 34% (01:41) wrong based on 217 sessions

HideShow timer Statistics

At the elite university, 500 students study Computer Science or Electrical Engineering or both. If 100 of these students do not study Electrical Engineering, how many of these students study both Computer Science and Electrical Engineering?

(1) Of the 500 students, 90 do not study Computer Science.
(2) A total of 410 of the students study Computer Science.

Originally posted by manasishah on 05 Aug 2013, 06:47.
Last edited by Zarrolou on 05 Aug 2013, 06:59, edited 1 time in total.
Edited the question, renamed the topic and added OA.
VP
VP
User avatar
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1056
Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
GMAT ToolKit User
Re: At the elite university, 500 students study Computer Science  [#permalink]

Show Tags

New post 05 Aug 2013, 06:59
At the elite university, 500 students study Computer Science or Electrical Engineering or both. If 100 of these students do not study Electrical Engineering, how many of these students study both Computer Science and Electrical Engineering?

Let ONLY Computer Science students be \(a\), ONLY Electrical Engineering students be \(c\) and students of BOTH be \(b\).
\(a+b+c=500\) the text says \(a=100\) (students do not study Electrical Engineering, so study ONLY CS). We have to find \(b\).

(1) Of the 500 students, 90 do not study Computer Science.
So the students of ONLY EE are \(90=c\).
\(100+b+90=500\), \(b=310\).
Sufficient

(2) A total of 410 of the students study Computer Science.
\(a+b=410\), \(100+b=410\), \(b=310\).
Sufficient
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

Director
Director
User avatar
Joined: 14 Dec 2012
Posts: 747
Location: India
Concentration: General Management, Operations
GMAT 1: 700 Q50 V34
GPA: 3.6
GMAT ToolKit User
Re: At the elite university, 500 students study Computer Science  [#permalink]

Show Tags

New post 05 Aug 2013, 07:11
manasishah wrote:
At the elite university, 500 students study Computer Science or Electrical Engineering or both. If 100 of these students do not study Electrical Engineering, how many of these students study both Computer Science and Electrical Engineering?

(1) Of the 500 students, 90 do not study Computer Science.
(2) A total of 410 of the students study Computer Science.


GIVEN
CS only + EE only + B =500 (500 students study Computer Science or Electrical Engineering or both).....1
CS only = 100 (100 of these students do not study Electrical Engineering).....2

STMNT 1: Of the 500 students, 90 do not study Computer Science.
EE only = 90
puting the values in eqn 1
100 + 90 + B =500
HENCE B=310
SUFFICIENT


STMNT 2:
A total of 410 of the students study Computer Science.
MEANS 90 STUDY ONLY EE
SAME INFORMATION AS STMNT 1
HENCE SUFFICIENT

SO D
_________________

When you want to succeed as bad as you want to breathe ...then you will be successfull....

GIVE VALUE TO OFFICIAL QUESTIONS...



GMAT RCs VOCABULARY LIST: http://gmatclub.com/forum/vocabulary-list-for-gmat-reading-comprehension-155228.html
learn AWA writing techniques while watching video : http://www.gmatprepnow.com/module/gmat-analytical-writing-assessment
: http://www.youtube.com/watch?v=APt9ITygGss

Manager
Manager
avatar
Status: Looking to improve
Joined: 15 Jan 2013
Posts: 152
GMAT 1: 530 Q43 V20
GMAT 2: 560 Q42 V25
GMAT 3: 650 Q48 V31
Re: At the elite university, 500 students study Computer Science  [#permalink]

Show Tags

New post 05 Aug 2013, 07:14
manasishah wrote:
At the elite university, 500 students study Computer Science or Electrical Engineering or both. If 100 of these students do not study Electrical Engineering, how many of these students study both Computer Science and Electrical Engineering?

(1) Of the 500 students, 90 do not study Computer Science.
(2) A total of 410 of the students study Computer Science.



Rephrasing the question information in a matrix visual. The value of the cell ?? is asked to be found.


Computer Science Not Computer Science Total
-----------------------------------------------------------------------------------------------------------------------
Electrical Engineering ?? 400
-----------------------------------------------------------------------------------------------------------------------
Not Electrical Engineering 100 0 100
------------------------------------------------------------------------------------------------------------------------
Total 500
-----------------------------------------------------------------------------------------------------------------------

From stmt 1, the matrix is updated as follows. Hence sufficient.

Computer Science Not Computer Science Total
-----------------------------------------------------------------------------------------------------------------------
Electrical Engineering ? = 310 90 400
-----------------------------------------------------------------------------------------------------------------------
Not Electrical Engineering 100 0 100
------------------------------------------------------------------------------------------------------------------------
Total 500
-----------------------------------------------------------------------------------------------------------------------

From stmt 2, the matrix is updated as follows. Hence sufficient.

Computer Science Not Computer Science Total
-----------------------------------------------------------------------------------------------------------------------
Electrical Engineering ? = 310 400
-----------------------------------------------------------------------------------------------------------------------
Not Electrical Engineering 100 0 100
------------------------------------------------------------------------------------------------------------------------
Total 410 500
-----------------------------------------------------------------------------------------------------------------------

Answer is D

Hope this helps
_________________

KUDOS is a way to say Thank You

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9879
Premium Member
Re: At the elite university, 500 students study Computer Science  [#permalink]

Show Tags

New post 09 Oct 2018, 06:08
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: At the elite university, 500 students study Computer Science   [#permalink] 09 Oct 2018, 06:08
Display posts from previous: Sort by

At the elite university, 500 students study Computer Science

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron
Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.