Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Jun 0808:00 PM EDT
-10:00 PM EDT
Master the GMAT with expert live instruction, a personalized study plan, and real-time support. Includes 40 hours of online classes plus 6 months of access to the TTP GMAT OnDemand video course. Mon/Wed June 8, 2026 →August 12, 2026 8:00pm-10:00pm EST
Jun 1006:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..- Jun 10
10:00 AM PDT
-11:00 AM PDT
Scoring 715 on the GMAT Focus Edition requires more than just learning formulas, memorizing concepts, or solving hundreds of questions. In this episode, Nishant shares how he improved his GMAT preparation by focusing on application of concepts, and more. 
Jun 1111:00 AM EDT
-01:00 PM EDT
TTP GMAT OnDemand gives serious students 400+ hours of expert video instruction, the full TTP course, AI support, weekly office hours, and a 715+ score guarantee—all built for elite GMAT score improvement.
03 Jan 2025, 02:20
Kudos
Bookmarks
carcass
It is simply a mixture problem. Men's concentration last year is 3/5. We don't know men's concentration in new members this year. That will decide the overall concentration and whether it is greater than 3/5.
(1) More than half of the new members are male.
This means C1 can be anywhere as shown in the diagram and accordingly Cavg will be less than / equal to / more than 3/5.
If C1 is very close to 1/2 as shown, Cavg will be less than 3/5. If C1 is more than 3/5, Cavg will be more than 3/5.
This alone is not sufficient.
Attachment:
Screenshot 2025-01-03 at 2.41.47 PM.png [ 40.75 KiB | Viewed 426 times ]
(2) The number of members of the club this year is 6/5 the number of members last year.
Gives us the weights that last year : new members = 5 : 1 but not C1. We cannot find Cavg without C1.
Using both also, we don't have C1. The same diagram is applicable.
Answer (E)
Check these video on weighted averages and mixtures:
https://www.youtube.com/watch?v=_GOAU7moZ2Q
https://www.youtube.com/watch?v=VdBl9Hw0HBg
and these posts:
https://anaprep.com/arithmetic-weighted-averages/
https://anaprep.com/arithmetic-mixtures/
29 May 2026, 04:09
Kudos
Bookmarks
Can we solve this intuitively?
Last year’s percentage of males is 60%
if the % male for this year has to be greater than 60%, then the # of males from the new members’ lot must be >60%. If they are less than 60%, then the % male for this year will be pulled to less than 60%
s1 says that more than 50% of new members are male, so the # of males could be 51% of new members, and the overall % can be less than 60 % or the # of males from new members could be 80%, and this year’s % males could be greater than 60%
statement 2 says 1/5 additional members are added. This doesn’t help much.
statement 1 and 2 together give us the 50% of 1/5 (new members) are males, the total number of males could be >50 % this year
they can either be <60% or they can be >60%, so we can’t be sure. Hence E.
Last year’s percentage of males is 60%
if the % male for this year has to be greater than 60%, then the # of males from the new members’ lot must be >60%. If they are less than 60%, then the % male for this year will be pulled to less than 60%
s1 says that more than 50% of new members are male, so the # of males could be 51% of new members, and the overall % can be less than 60 % or the # of males from new members could be 80%, and this year’s % males could be greater than 60%
statement 2 says 1/5 additional members are added. This doesn’t help much.
statement 1 and 2 together give us the 50% of 1/5 (new members) are males, the total number of males could be >50 % this year
they can either be <60% or they can be >60%, so we can’t be sure. Hence E.
Moderators:
343 posts
