Last visit was: 17 Jul 2025, 15:34 It is currently 17 Jul 2025, 15:34
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
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 17 Jul 2025
Posts: 102,605
Own Kudos:
742,281
 [2]
Given Kudos: 98,220
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 102,605
Kudos: 742,281
 [2]
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
User avatar
Kinshook
User avatar
Major Poster
Joined: 03 Jun 2019
Last visit: 17 Jul 2025
Posts: 5,703
Own Kudos:
Given Kudos: 161
Location: India
GMAT 1: 690 Q50 V34
WE:Engineering (Transportation)
Products:
GMAT 1: 690 Q50 V34
Posts: 5,703
Kudos: 5,232
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 17 Jul 2025
Posts: 21,133
Own Kudos:
26,192
 [1]
Given Kudos: 296
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 21,133
Kudos: 26,192
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
T-bezz
Joined: 27 Apr 2023
Last visit: 20 Aug 2024
Posts: 9
Own Kudos:
Given Kudos: 19
Posts: 9
Kudos: 2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Class A avg = 85
Class B avg = 80
Total class avg= 82

Since it's a weighted avg question, and 82 is "closer" to 80, then we know that Class A has less students.

----2x ---------------3x
|-----------|---------------------|
80---------82 -------------------85

A+B = 5X
40=5x
x=40/5=8

Class A (as previously mentioned it's smaller) = 8 (2) = 16 (answer C)
User avatar
Andrew89
Joined: 10 Dec 2023
Last visit: 17 Jul 2025
Posts: 18
Own Kudos:
Given Kudos: 127
Location: Egypt
Posts: 18
Kudos: 12
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Simple answer = Total A+B scores / Total A+B number of students = 82
(85A + 80B)/ A+B = 82

85A + 80B = 82A + 82B ==> 3A=2B ==> A= 2B/3

Since A+B = 40 ==> 2B/3 + B = 40 ==> 5B/3= 40, 5B=120
Then B= 24, A= 40-24=16

Answer is 16 (C)
Moderators:
Math Expert
102605 posts
PS Forum Moderator
698 posts