Last visit was: 29 Apr 2026, 05:36 It is currently 29 Apr 2026, 05:36
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 29 Apr 2026
Posts: 109,968
Own Kudos:
811,897
 [5]
Given Kudos: 105,946
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,968
Kudos: 811,897
 [5]
Of the 36 students in a certain class, 10 are in the chess club and 13 24 Oct 2019, 00:18
Kudos
Add Kudos
5
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

25% (medium)

Question Stats:

76% (01:22) correct 24% (01:28) wrong based on 216 sessions

History

Date
Time
Result
Not Attempted Yet
Of the 36 students in a certain class, 10 are in the chess club and 13 are in the bridge club. If 20 of the students are not in either club, how many of the students are in only one of the two clubs?

A. 7
B. 9
C. 14
D. 16
E. 23
ShowHide Answer
Official Answer
B
Most Helpful Reply
User avatar
KSBGC
User avatar
Joined: 31 Oct 2013
Last visit: 10 Mar 2022
Posts: 1,240
Own Kudos:
1,510
 [5]
Given Kudos: 635
Concentration: Accounting, Finance
GPA: 3.68
WE:Analyst (Accounting)
Posts: 1,240
Kudos: 1,510
 [5]
Of the 36 students in a certain class, 10 are in the chess club and 13 24 Oct 2019, 00:27
4
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Bunuel
Of the 36 students in a certain class, 10 are in the chess club and 13 are in the bridge club. If 20 of the students are not in either club, how many of the students are in only one of the two clubs?

A. 7
B. 9
C. 14
D. 16
E. 23
Show more


Total = C + B - Both + Neither

36 = 10 +13 - Both + 20

Both = 7,

Only chess = 10 - 7 = 3

Only Bridge = 13 - 7 = 6.

Members playing single games = 6 + 3 = 9.

B is the option.
General Discussion
User avatar
LevanKhukhunashvili
User avatar
Joined: 13 Feb 2018
Last visit: 23 Jan 2021
Posts: 369
Own Kudos:
457
 [1]
Given Kudos: 50
GMAT 1: 640 Q48 V28
GMAT 1: 640 Q48 V28
Posts: 369
Kudos: 457
 [1]
Of the 36 students in a certain class, 10 are in the chess club and 13 24 Oct 2019, 00:34
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
All=chess+bridge-bith+neither
36=10+13-both+20
both=7

only one club=all-neither-both
only one club=36-20-7=9

IMO
Ans: B
User avatar
EgmatQuantExpert
User avatar
e-GMAT Representative
Joined: 04 Jan 2015
Last visit: 02 Apr 2024
Posts: 3,657
Own Kudos:
20,905
Given Kudos: 165
Expert
Expert reply
Posts: 3,657
Kudos: 20,905
Of the 36 students in a certain class, 10 are in the chess club and 13 31 Oct 2019, 03:58
Kudos
Add Kudos
Bookmarks
Bookmark this Post

Solution



Given
    • In a class, there are 36 students.
      o 10 of them are in chess club
      o 13 are in high bridge.

To find
    • The number of student that are in only one of the two clubs if 20 of the students are not in either club

Approach and Working out
Total students of the class – Students who are not part of any club = Students part of chess club + Students part of High bridge - Students part of both the clubs

    • 36 – 20 = 10 + 13 - Students part of both the clubs
    • 16 = 23 - Students part of both the clubs
    • Students part of both the clubs = 7
So, 16 students were part of clubs. And 7 of them were in both of them.
Hence, 16-7 =9 were part of only1 club.

Thus, option B is the correct answer.

Correct Answer: Option B
avatar
ashudhall
avatar
Joined: 27 Mar 2016
Last visit: 26 Jan 2021
Posts: 73
Own Kudos:
72
Given Kudos: 4
GMAT 1: 590 Q44 V22
GMAT 1: 590 Q44 V22
Posts: 73
Kudos: 72
Of the 36 students in a certain class, 10 are in the chess club and 13 03 Nov 2019, 00:36
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Members in only chess + members in only bridge + members in both + members in neither =36
Members in chess + members in bridge + members in both =20
Let the number of members in both = x
10-x +13-x + x =16
x =7
Members in in only one of the two clubs = Members in only chess + members in only bridge = 3+6 =9
Hence B
User avatar
MathRevolution
User avatar
Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Last visit: 27 Sep 2022
Posts: 10,063
Own Kudos:
20,016
Given Kudos: 4
GMAT 1: 760 Q51 V42
GPA: 3.82
Expert
Expert reply
GMAT 1: 760 Q51 V42
Posts: 10,063
Kudos: 20,016
Of the 36 students in a certain class, 10 are in the chess club and 13 09 Dec 2020, 00:59
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Total - neither = Chess + Bridge - Both

=> 36 - 20 = 10 + 13 - Both

=> Both = 10 + 13 - 16 = 7

Chess - Both = Only chess = 10 - 7 = 3

Bridge - Both = Only bridge = 13 - 7 = 6

Total: 3 + 6 = 9

Answer B
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,984
Own Kudos:
1,119
Posts: 38,984
Kudos: 1,119
Of the 36 students in a certain class, 10 are in the chess club and 13 07 Dec 2024, 14:30
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderators:
Bunuel
Math Expert
109968 posts
Krunaal
Tuck School Moderator
852 posts