It is currently 22 Jun 2017, 15:47

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

Events & Promotions in June
Open Detailed Calendar

This semester, each of the 90 students in a certain class

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

Hide Tags

Manager
Manager
User avatar
Joined: 19 Aug 2006
Posts: 212
This semester, each of the 90 students in a certain class [#permalink]

Show Tags

New post 11 Nov 2006, 06:49
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

88% (01:54) correct 12% (01:21) wrong based on 36 sessions

HideShow timer Statistics

This semester, each of the 90 students in a certain class took at least one course from A, B, and C. If 60 students took A, 40 students took B, 20 students took C, and 5 students took all the three, how many students took exactly two courses?
Manager
Manager
avatar
Joined: 16 Dec 2005
Posts: 60
Re: PS[sets] [#permalink]

Show Tags

New post 11 Nov 2006, 07:30
90=60+40+20-(two class)+5
two class =35
only two class =35-3*5=20
Intern
Intern
avatar
Joined: 18 Jun 2006
Posts: 4
 [#permalink]

Show Tags

New post 11 Nov 2006, 07:46
Only A = 60 - 5 - AB - AC = 55 - AB - AC
Only B = 40 - 5 - AB - BC = 35 - AB - BC
Only C = 20 - 5 - AC - BC = 15 - AC - BC

(55- AB - AC) + (35-AB-BC) + (15-AC-BC) + 5 + AB + AC + BC = 90
110 - AB - AC - BC = 90
AB+ AC+BC =20
Manager
Manager
avatar
Joined: 10 Sep 2012
Posts: 145
Re: This semester, each of the 90 students in a certain class [#permalink]

Show Tags

New post 04 Dec 2012, 23:47
Could someone explain this part?

only two class =35-3*5=20
Expert Post
Math Expert
User avatar
D
Joined: 02 Sep 2009
Posts: 39589
Re: This semester, each of the 90 students in a certain class [#permalink]

Show Tags

New post 05 Dec 2012, 03:12
Director
Director
avatar
Joined: 03 Aug 2012
Posts: 893
Concentration: General Management, General Management
GMAT 1: 630 Q47 V29
GMAT 2: 680 Q50 V32
GPA: 3.7
WE: Information Technology (Investment Banking)
Premium Member
Re: This semester, each of the 90 students in a certain class [#permalink]

Show Tags

New post 18 Aug 2013, 05:40
Total=60+40+20-X-2*All three.

90=60+40+20-X-10

X=20
_________________

Rgds,
TGC!
_____________________________________________________________________
I Assisted You => KUDOS Please
_____________________________________________________________________________

Senior Manager
Senior Manager
avatar
Joined: 10 Jul 2013
Posts: 334
Re: This semester, each of the 90 students in a certain class [#permalink]

Show Tags

New post 18 Aug 2013, 13:40
johnycute wrote:
This semester, each of the 90 students in a certain class took at least one course from A, B, and C. If 60 students took A, 40 students took B, 20 students took C, and 5 students took all the three, how many students took exactly two courses?


Exactly two courses : A+B+C - 2(A n B n C) - (A u B u C ) = 60 + 40 + 20 - 2 * 5 - 90 = 20 (Answer)
_________________

Asif vai.....

Re: This semester, each of the 90 students in a certain class   [#permalink] 18 Aug 2013, 13:40
    Similar topics Author Replies Last post
Similar
Topics:
9 For each student in a certain class, a teacher adjusted the student’s AbdurRakib 2 12 Jun 2017, 21:10
7 Experts publish their posts in the topic In a certain accounting class of 90 students 70% of the students took aashu4uiit 9 20 Jun 2017, 23:44
29 Experts publish their posts in the topic A certain class consists of 8 students, including Kim. Each megafan 10 12 Apr 2017, 12:03
13 Experts publish their posts in the topic Of the students at a certain high school, 90 percent took a ritumaheshwari02 7 12 Aug 2016, 05:03
2 Experts publish their posts in the topic A certain class consists of 8 students, including Don. Each tirupatibalaji 4 01 Mar 2011, 07:14
Display posts from previous: Sort by

This semester, each of the 90 students in a certain class

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


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.