Last visit was: 19 Nov 2025, 13:03 It is currently 19 Nov 2025, 13:03
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
User avatar
JarvisR
Joined: 05 Nov 2012
Last visit: 05 Jan 2017
Posts: 337
Own Kudos:
4,901
 [50]
Given Kudos: 606
Concentration: Technology, Other
Products:
4
Kudos
Add Kudos
45
Bookmarks
Bookmark this Post
Most Helpful Reply
User avatar
pqhai
User avatar
Retired Moderator
Joined: 16 Jun 2012
Last visit: 26 Nov 2015
Posts: 867
Own Kudos:
8,883
 [8]
Given Kudos: 123
Location: United States
Posts: 867
Kudos: 8,883
 [8]
5
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
General Discussion
User avatar
daboo343
Joined: 09 Nov 2012
Last visit: 20 Nov 2022
Posts: 223
Own Kudos:
708
 [4]
Given Kudos: 162
Status:You have to have the darkness for the dawn to come
Daboo: Sonu
GMAT 1: 590 Q49 V20
GMAT 2: 730 Q50 V38
Products:
GMAT 2: 730 Q50 V38
Posts: 223
Kudos: 708
 [4]
2
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
User avatar
keats
Joined: 28 Nov 2014
Last visit: 08 Jun 2019
Posts: 739
Own Kudos:
1,361
 [1]
Given Kudos: 86
Concentration: Strategy
GPA: 3.71
Products:
Posts: 739
Kudos: 1,361
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I have made the same Venn diagram as daboo343 However, I see that both (A) and (E) can be true. How do I eliminate one and reach the correct answer.
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 18 Jul 2025
Posts: 5,934
Own Kudos:
5,328
 [1]
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,934
Kudos: 5,328
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Keats
I have made the same Venn diagram as daboo343 However, I see that both (A) and (E) can be true. How do I eliminate one and reach the correct answer.

You can eliminate option (E) if you consider CASE 1

Can you state - Some members of the chess club are not members of the debate society : Definitely no becasue here " Non member of Chess club is a member of Debate society " OR " Non member of Debate society is a member of Chess club "

However if you consider CASE 2

You can state option (E) Some members of the chess club are not members of the debate society

Remember a conclusion is one which holds true in all the possible combination or arrangement, so we may eliminate option (E)
User avatar
keats
Joined: 28 Nov 2014
Last visit: 08 Jun 2019
Posts: 739
Own Kudos:
Given Kudos: 86
Concentration: Strategy
GPA: 3.71
Products:
Posts: 739
Kudos: 1,361
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Abhishek009 : Thank you for response.

I see that Case 2 infact tells me that option (E) is not correct. From Case 2 Venn, it is clear that some of the members of chess club are members of debate society (some part of black overlaps with green)

And if I am not mistaken E is the answer. Why are you trying to disprove it?
User avatar
abhimahna
User avatar
Board of Directors
Joined: 18 Jul 2015
Last visit: 06 Jul 2024
Posts: 3,514
Own Kudos:
Given Kudos: 346
Status:Emory Goizueta Alum
Products:
Expert
Expert reply
Posts: 3,514
Kudos: 5,728
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Keats
I have made the same Venn diagram as daboo343 However, I see that both (A) and (E) can be true. How do I eliminate one and reach the correct answer.

A cannot be inferred out of the information given.

We are given that some members of Basketball club are also the members of chess club.

So, say Total basket ball members = 100

Total Chess members = 50.

Now, it may happen that All these 50 members are out of those 100 only. So, we cannot directly say that some chess members are not basket ball members.

E is the Best answer.
User avatar
keats
Joined: 28 Nov 2014
Last visit: 08 Jun 2019
Posts: 739
Own Kudos:
Given Kudos: 86
Concentration: Strategy
GPA: 3.71
Products:
Posts: 739
Kudos: 1,361
Kudos
Add Kudos
Bookmarks
Bookmark this Post
abhimahna Thank you for the response. Can you help me explain the case with Venn. Just options (A) and (E). For me, option (E) is coming out as an answer when I look at both the Venn.

PS: I am assuming what logically flows from the argument is a "must be true" case.
User avatar
abhimahna
User avatar
Board of Directors
Joined: 18 Jul 2015
Last visit: 06 Jul 2024
Posts: 3,514
Own Kudos:
5,728
 [3]
Given Kudos: 346
Status:Emory Goizueta Alum
Products:
Expert
Expert reply
Posts: 3,514
Kudos: 5,728
 [3]
2
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Keats
abhimahna Thank you for the response. Can you help me explain the case with Venn. Just options (A) and (E). For me, option (E) is coming out as an answer when I look at both the Venn.

PS: I am assuming what logically flows from the argument is a "must be true" case.

ok. so, you made me do some drawing after so many years. :-D

Look at the diagrams below. A is out as per the diagram on the left and E is correct as per the diagram on the right.

Also, please note that we are given " Some members of chess are members of basketball" - (1)

And " NO member of basketball is a member of Debate". Doesn't that mean those common members at the statement (1) won't be member of Debate society?

Lets take another example, Say You and I are members of Both Chess and Basket Ball.

Now, We have a condition that NO ONE from basket ball team could participate in debate, what would you infer out of that??
Attachments

Pic.jpg
Pic.jpg [ 58.71 KiB | Viewed 12029 times ]

User avatar
keats
Joined: 28 Nov 2014
Last visit: 08 Jun 2019
Posts: 739
Own Kudos:
Given Kudos: 86
Concentration: Strategy
GPA: 3.71
Products:
Posts: 739
Kudos: 1,361
Kudos
Add Kudos
Bookmarks
Bookmark this Post
abhimahna

The first Venn on the left seals it. I have understood where I was going wrong. I missed the possibility of drawing the case where all the members of the chess club can be a part of the basketball club. This will rule out option A.

However, if I look at Venn 1, and see (E) Some members of the chess club are not members of the debate society
The above option gets incorrect because from the Venn 1, it is clear that all the members of the chess club are not members of debate society (The circle of chess club is completely inside basketball and there is no overlap of chess with debate)
User avatar
abhimahna
User avatar
Board of Directors
Joined: 18 Jul 2015
Last visit: 06 Jul 2024
Posts: 3,514
Own Kudos:
5,728
 [2]
Given Kudos: 346
Status:Emory Goizueta Alum
Products:
Expert
Expert reply
Posts: 3,514
Kudos: 5,728
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Keats
abhimahna

The first Venn on the left seals it. I have understood where I was going wrong. I missed the possibility of drawing the case where all the members of the chess club can be a part of the basketball club. This will rule out option A.

However, if I look at Venn 1, and see (E) Some members of the chess club are not members of the debate society
The above option gets incorrect because from the Venn 1, it is clear that all the members of the chess club are not members of debate society (The circle of chess club is completely inside basketball and there is no overlap of chess with debate)

Keats bro,

You are again missing something here.

Lets take another example,

I have 10 members in chess club and as per my diagram on the left, I can say NONE is a member of debate club.

If None is a member, then it would obviously mean some are also not.

Notice the words NOT in both. I am not saying "None is a member of debate club, so Some are member of debate club." BUT I am saying the same thing. "None is a member of debate club, so some are not a Member of debate club"

This is a logical deductions concept frequently tested on exams like CAT,SAT but sometimes tested on GMAT.

I would suggest go through the below link and try solving all the questions given.

https://www.indiabix.com/logical-reasoni ... troduction
User avatar
keats
Joined: 28 Nov 2014
Last visit: 08 Jun 2019
Posts: 739
Own Kudos:
Given Kudos: 86
Concentration: Strategy
GPA: 3.71
Products:
Posts: 739
Kudos: 1,361
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I see abhimahna I understand your point. Thanks for bearing with me :-D I have never prepared for CAT and somehow such type of problems give me hard time. However, I understand now when you say 'None of the members in the Chess Club are a part of Debate Club will ensure that some of the members of the Chess Club are obviously not the part of Debate Club.'
avatar
baalok88
Joined: 20 Jan 2015
Last visit: 27 Jan 2020
Posts: 8
Own Kudos:
Given Kudos: 4
Posts: 8
Kudos: 1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
hello,
Please advise me on the attached question. I have drawn an explanatory diagram.
I clearly believe that if there's no relation given between 'Debate Soc' members and Chess members, we can not draw any relation between them.

will be a great help if this is sorted for such an easy question.
Attachments

File comment: CR question
Some members.. CR.PNG
Some members.. CR.PNG [ 36.86 KiB | Viewed 11862 times ]

User avatar
DmitryFarber
User avatar
Manhattan Prep Instructor
Joined: 22 Mar 2011
Last visit: 08 Nov 2025
Posts: 3,020
Own Kudos:
8,563
 [3]
Given Kudos: 57
Expert
Expert reply
GMAT Focus 1: 745 Q86 V90 DI85
Posts: 3,020
Kudos: 8,563
 [3]
2
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
baalok88, let's look at that intersection of "basketball" and "chess" in your diagram. What do we know about those people? They are in both clubs, right? What else do we know about them? We know nothing else about the chess club, but we know that none of the basketball players are in the debate society. That must apply to these basketball players, too!

So, looking at E, we know that there must at least be some chess players who are not in the debate society. Which ones? Those who are also on the basketball team.

By the way, A represents a common trap. The word "some" does not preclude "all." If I say "some of my friends have long hair," that just means that I have at least one long-haired friend. However, it could certainly be that all of my friends are long-haired. In short, when we say "some X are Y," that does not imply "some X are not Y." For instance, it is correct to say "some countries have capitals" or "some people have DNA," even though ALL countries have capitals and ALL people have DNA.
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 19 Nov 2025
Posts: 105,390
Own Kudos:
778,346
 [3]
Given Kudos: 99,977
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,390
Kudos: 778,346
 [3]
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
JarvisR
Some members of the basketball team are members of the chess club, but no members of the basketball team are members of the debate society.

If the statements above are true, which of the following may be drawn from them?

A Some members of the chess club are not members of the basketball team.
B No members of the chess club are members of the debate society.
C Some members of the chess club are members of the debate society.
D No members of the debate society are members of the chess club .
E Some members of the chess club are not members of the debate society

What shall be the approach for such question?

VERITAS PREP OFFICIAL SOLUTION:




Solution: E

The premises given can be expressed like this: Some B => C; no B => D. To link them together, we need the term they have in common (B) to come AFTER the arrow in one statement and BEFORE the arrow in the other, so we need to consider how we could rewrite each premise. Some B => C can be written as Some C => B – you can always ‘flip’ a particular (“Some”) singular statement – and no B => D can be rewritten as B => not D. (You can always transfer a negative to the other side of a statement, universal or particular.) This gives us Some C => B and B => not D, meaning that (E) is the best answer choice.
User avatar
Fdambro294
Joined: 10 Jul 2019
Last visit: 20 Aug 2025
Posts: 1,350
Own Kudos:
Given Kudos: 1,656
Posts: 1,350
Kudos: 742
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Very simply.....

Some members of the basketball team are members of the chess team.

These “some” members of both basketball AND chess will NEVER be members of the debate team.

Why? Because we are told NOT ONE Single basketball player is part of Debate. This includes the “some” who do Basketball AND Chess.


Correct Answer
-E-

Definitively, without a doubt, there must be “some” members of the chess team (those who are ALSO playing basketball) that are NOT part of the debate team

Posted from my mobile device
avatar
Dhwanii
Joined: 16 Mar 2021
Last visit: 04 Feb 2023
Posts: 73
Own Kudos:
Given Kudos: 96
Posts: 73
Kudos: 13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
abhimahna
Keats
I have made the same Venn diagram as daboo343 However, I see that both (A) and (E) can be true. How do I eliminate one and reach the correct answer.

A cannot be inferred out of the information given.

We are given that some members of Basketball club are also the members of chess club.

So, say Total basket ball members = 100

Total Chess members = 50.

Now, it may happen that All these 50 members are out of those 100 only. So, we cannot directly say that some chess members are not basket ball members.

E is the Best answer.

Even I thought that the case all 50 are out of 100, still how can we correctly infer E ? For E TO BE TRUE, case of all 50 are out of 100 cannot be considered
User avatar
VerbalBot
User avatar
Non-Human User
Joined: 01 Oct 2013
Last visit: 04 Jan 2021
Posts: 18,829
Own Kudos:
Posts: 18,829
Kudos: 986
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello from the GMAT Club VerbalBot!

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.
Moderators:
GMAT Club Verbal Expert
7443 posts
GMAT Club Verbal Expert
231 posts
189 posts