Last visit was: 19 Nov 2025, 18:11 It is currently 19 Nov 2025, 18:11
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
BottomJee
User avatar
Retired Moderator
Joined: 05 May 2019
Last visit: 09 Jun 2025
Posts: 996
Own Kudos:
1,327
 [29]
Given Kudos: 1,009
Affiliations: GMAT Club
Location: India
GMAT Focus 1: 645 Q82 V81 DI82
GMAT 1: 430 Q31 V19
GMAT 2: 570 Q44 V25
GMAT 3: 660 Q48 V33
GPA: 3.26
WE:Engineering (Manufacturing)
Products:
GMAT Focus 1: 645 Q82 V81 DI82
GMAT 3: 660 Q48 V33
Posts: 996
Kudos: 1,327
 [29]
1
Kudos
Add Kudos
28
Bookmarks
Bookmark this Post
User avatar
Sajjad1994
User avatar
GRE Forum Moderator
Joined: 02 Nov 2016
Last visit: 19 Nov 2025
Posts: 17,304
Own Kudos:
49,313
 [2]
Given Kudos: 6,180
GPA: 3.62
Products:
Posts: 17,304
Kudos: 49,313
 [2]
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
jaynstein
Joined: 28 Feb 2024
Last visit: 21 Jan 2025
Posts: 4
Own Kudos:
1
 [1]
Given Kudos: 1
Posts: 4
Kudos: 1
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
ravitejab1
for the 1st one, why is it not 20%? as per graph, 20% (purple line) of the of 8th graders in 2017 participated in Math team.
Adding all the percentages in the 8th grade will be equal to 185 percent, now, any student can take part in either one or maximum of two activities, so adding 185 percent, adds the students taking part in two activities twice.
Hence 185 - ( students taking part in 2 activiites)= 100,
so, students taking part in two activities = 85 percent , and , hence students taking part in only one activity is 15 percent, as it is mandatory for a student to take part in atleast one of the activities,
Hope u understood, this requires a fundamental understanding of overlapping sets concept.
User avatar
ManishaPrepMinds
Joined: 14 Apr 2020
Last visit: 19 Nov 2025
Posts: 139
Own Kudos:
123
 [3]
Given Kudos: 10
Location: India
Expert
Expert reply
Posts: 139
Kudos: 123
 [3]
2
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Q1.
From the 8th Grade data on the graph:

Sport activities:
Soccer: ~45%
Tennis: ~25%
Track: ~25%
Total sport participation: 45 + 25 + 25 = 95%
Non-sport activities:
Math team: ~20%
Band: ~55%
Debate: ~15%
Total non-sport participation: 20 + 55 + 15 = 90%
Let’s assume 100 total students in 8th grade
using overlapping sets
Students in both categories = Sport % + Non-sport % - 100% = 95% + 90% - 100% = 85%( (since everyone must do at least one activity)
Students in exactly one activity = 100% - 85% = 15%
Answer: Approximately 15 percent

Q2)

Visual Pattern Recognition
Look for grades where sports lines are generally higher than non-sports lines & for this focus on dominant activities

Sports: Soccer (red) is usually highest
Non-sports: Band (teal) is usually highest
you can quickly eliminate all the grade except for 8 & 12th grade which are quite close. Hence verify these 2 only.
8th: Sports ~95%, Non-sports ~90% → Sports win
12th: Sports ~98%, Non-sports ~77% → Sports win

Answer: were two grade levels

Key insight: For comparison questions, identify the dominant elements first, then calculate only the borderline cases.
User avatar
bagarwal11
Joined: 07 Sep 2025
Last visit: 19 Nov 2025
Posts: 9
Given Kudos: 144
Products:
Posts: 9
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
you approach to identify dominant is unclear here. Could you please how you eliminated the other grades and come down to 10th and 12th?
Mannisha
Q1.
From the 8th Grade data on the graph:

Sport activities:
Soccer: ~45%
Tennis: ~25%
Track: ~25%
Total sport participation: 45 + 25 + 25 = 95%
Non-sport activities:
Math team: ~20%
Band: ~55%
Debate: ~15%
Total non-sport participation: 20 + 55 + 15 = 90%
Let’s assume 100 total students in 8th grade
using overlapping sets
Students in both categories = Sport % + Non-sport % - 100% = 95% + 90% - 100% = 85%( (since everyone must do at least one activity)
Students in exactly one activity = 100% - 85% = 15%
Answer: Approximately 15 percent

Q2)

Visual Pattern Recognition
Look for grades where sports lines are generally higher than non-sports lines & for this focus on dominant activities

Sports: Soccer (red) is usually highest
Non-sports: Band (teal) is usually highest
you can quickly eliminate all the grade except for 8 & 12th grade which are quite close. Hence verify these 2 only.
8th: Sports ~95%, Non-sports ~90% → Sports win
12th: Sports ~98%, Non-sports ~77% → Sports win

Answer: were two grade levels

Key insight: For comparison questions, identify the dominant elements first, then calculate only the borderline cases.



Moderators:
Math Expert
105390 posts
496 posts