Last visit was: 16 Sep 2026, 18:16 It is currently 16 Sep 2026, 18:16
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: 16 Sep 2026
Posts: 113,597
Own Kudos:
841,731
 [10]
Given Kudos: 111,580
Products:
GMAT Club Tests
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 113,597
Kudos: 841,731
 [10]
In a survey it was found that 95% of those surveyed liked mustard and 22 Dec 2016, 02:25
2
Kudos
Add Kudos
8
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
C
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:

77% (01:30) correct 23% (01:31) wrong based on 267 sessions

History

Date
Time
Result
Not Attempted Yet
In a survey it was found that 95% of those surveyed liked mustard and 85% of the people liked mayonnaise, if there are 100 people in the survey, what is the least number of people who could have liked mustard and mayonnaise?

A. 75
B. 79
C. 80
D. 81
E. 85
ShowHide Answer
Official Answer
C
avatar
RR88
avatar
Joined: 18 Oct 2016
Last visit: 16 Oct 2019
Posts: 107
Own Kudos:
151
 [1]
Given Kudos: 91
Location: India
WE:Engineering (Energy)
Posts: 107
Kudos: 151
 [1]
In a survey it was found that 95% of those surveyed liked mustard and 25 Dec 2016, 10:47
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Option C)

Number of people surveyed = 100
Liked Mustard = 95
Liked Mayonnaise = 85

Liked Mustard & Mayonnaise (Least) = 95 + 85 -100 = 80
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,878
Own Kudos:
5,544
 [1]
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,878
Kudos: 5,544
 [1]
In a survey it was found that 95% of those surveyed liked mustard and 25 Dec 2016, 12:48
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In a survey it was found that 95% of those surveyed liked mustard and 85% of the people liked mayonnaise, if there are 100 people in the survey, what is the least number of people who could have liked mustard and mayonnaise?

A. 75
B. 79
C. 80
D. 81
E. 85
Show more

( 85 + 95 ) - 100 = 80

Hence , the correct answer will be (C) 80...
User avatar
chesstitans
User avatar
Joined: 12 Dec 2016
Last visit: 20 Nov 2019
Posts: 959
Own Kudos:
1,962
Given Kudos: 2,561
Location: United States
Schools: Stanford '19 Carroll '19 LBS '19
GMAT 1: 700 Q49 V33
GPA: 3.64
Schools: Stanford '19 Carroll '19 LBS '19
GMAT 1: 700 Q49 V33
Posts: 959
Kudos: 1,962
In a survey it was found that 95% of those surveyed liked mustard and 30 Oct 2017, 11:58
Kudos
Add Kudos
Bookmarks
Bookmark this Post
"the people" here refers to the total people who are surveyed.
User avatar
testcracker
User avatar
Joined: 24 Mar 2015
Last visit: 02 Dec 2024
Posts: 198
Own Kudos:
135
 [3]
Given Kudos: 541
Status:love the club...
Posts: 198
Kudos: 135
 [3]
In a survey it was found that 95% of those surveyed liked mustard and 25 Nov 2017, 07:57
1
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
Bunuel
In a survey it was found that 95% of those surveyed liked mustard and 85% of the people liked mayonnaise, if there are 100 people in the survey, what is the least number of people who could have liked mustard and mayonnaise?

A. 75
B. 79
C. 80
D. 81
E. 85
Show more


when "none" = 0, "both" = 80
when "none" = 5, "both" = 85

since, here it is asked for the least possible value of "both", "none" is equal to 0, and "both" is equal to 80

the rule that bears mention: when "none" is at the least, "both" is also at the least, and when the value of "none" is set as the highest, the value of "both" will also be the highest and vice - versa

thanks
cheers through the kudos button if this helps
:cool:
User avatar
Vorovski
User avatar
Joined: 16 Oct 2017
Last visit: 17 Jan 2018
Posts: 24
Own Kudos:
33
Given Kudos: 79
Location: Ireland
Concentration: Healthcare, Finance
Posts: 24
Kudos: 33
In a survey it was found that 95% of those surveyed liked mustard and 25 Nov 2017, 09:23
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In a survey it was found that 95% of those surveyed liked mustard and 85% of the people liked mayonnaise, if there are 100 people in the survey, what is the least number of people who could have liked mustard and mayonnaise?

A. 75
B. 79
C. 80
D. 81
E. 85
Show more

The least number when mustard and mayo overlap is 80
Attachments

diagram.jpg
diagram.jpg [ 13.68 KiB | Viewed 3354 times ]

User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,228
Own Kudos:
1,160
Posts: 39,228
Kudos: 1,160
In a survey it was found that 95% of those surveyed liked mustard and 28 Sep 2024, 08:34
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.
Moderator:
Bunuel
Math Expert
113597 posts