Last visit was: 24 Apr 2026, 07:03 It is currently 24 Apr 2026, 07:03
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: 24 Apr 2026
Posts: 109,813
Own Kudos:
810,998
 [1]
Given Kudos: 105,871
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,813
Kudos: 810,998
 [1]
In Country Z, the ratio of residents under 25 years of age to resident 21 Nov 2018, 23:39
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

84% (01:00) correct 16% (00:46) wrong based on 148 sessions

History

Date
Time
Result
Not Attempted Yet
In Country Z, the ratio of residents under 25 years of age to residents 25 years or older is 3 to 2. If there are 36 million people under 25 years of age residing in Country Z, how many people reside in Country Z, in millions?

A. 18
B. 24
C. 36
D. 48
E. 60
ShowHide Answer
Official Answer
E
User avatar
Archit3110
User avatar
Major Poster
Joined: 18 Aug 2017
Last visit: 24 Apr 2026
Posts: 8,629
Own Kudos:
5,190
Given Kudos: 243
Status:You learn more from failure than from success.
Location: India
Concentration: Sustainability, Marketing
GMAT Focus 1: 545 Q79 V79 DI73
GMAT Focus 2: 645 Q83 V82 DI81
GPA: 4
WE:Marketing (Energy)
Products:
GMAT Club Tests Forum Quiz
GMAT Focus 2: 645 Q83 V82 DI81
Posts: 8,629
Kudos: 5,190
In Country Z, the ratio of residents under 25 years of age to resident 22 Nov 2018, 00:32
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In Country Z, the ratio of residents under 25 years of age to residents 25 years or older is 3 to 2. If there are 36 million people under 25 years of age residing in Country Z, how many people reside in Country Z, in millions?

A. 18
B. 24
C. 36
D. 48
E. 60
Show more


Total people in Z = 3*x/5=36
x= 60 IMO E

Alternatively
3/2=36/x
solve for x we get 24
so total would be 24+36 = 60 option E
User avatar
v12345
User avatar
Joined: 01 Mar 2015
Last visit: 19 Jan 2026
Posts: 398
Own Kudos:
1,117
Given Kudos: 44
Location: India
Posts: 398
Kudos: 1,117
In Country Z, the ratio of residents under 25 years of age to resident 22 Jul 2020, 10:07
Kudos
Add Kudos
Bookmarks
Bookmark this Post
\(\frac{3}{2}=\frac{36}{x}\)
=> 3x = 72
=> x = 24
Total people in Z = 36 + 24 = 60

Hence, OA is (E).
User avatar
CrackverbalGMAT
User avatar
Major Poster
Joined: 03 Oct 2013
Last visit: 24 Apr 2026
Posts: 4,846
Own Kudos:
9,182
Given Kudos: 226
Affiliations: CrackVerbal
Location: India
Expert
Expert reply
Posts: 4,846
Kudos: 9,182
In Country Z, the ratio of residents under 25 years of age to resident 17 Sep 2020, 19:55
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Another method is by eliminating options.

Let < 25 = X and \(\geq 25\) be Y.


X : Y = 3 : 2 and X is 36 million.



From this data, we get 2 important pieces of information.

(a) Y has to be lesser than X, which gives us either Options A or B.

(b) The sum of A and B has to be divisible by 2 + 3 = 5.

36 + 18 = 54 is not divisible by 5, but 36 + 24 = 60, which is divisible by 5.



Option B

Arun Kumar
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,903
Own Kudos:
5,454
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,903
Kudos: 5,454
In Country Z, the ratio of residents under 25 years of age to resident 18 Sep 2020, 10:59
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In Country Z, the ratio of residents under 25 years of age to residents 25 years or older is 3 to 2. If there are 36 million people under 25 years of age residing in Country Z, how many people reside in Country Z, in millions?

A. 18
B. 24
C. 36
D. 48
E. 60
Show more
3x = 36 million

So, 2x = 24 Million

Hence, total population will be 60 Million, Answer must be (E)
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 23 Apr 2026
Posts: 22,283
Own Kudos:
26,534
Given Kudos: 302
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: 22,283
Kudos: 26,534
In Country Z, the ratio of residents under 25 years of age to resident 24 Sep 2020, 08:15
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
In Country Z, the ratio of residents under 25 years of age to residents 25 years or older is 3 to 2. If there are 36 million people under 25 years of age residing in Country Z, how many people reside in Country Z, in millions?

A. 18
B. 24
C. 36
D. 48
E. 60
Show more
Solution:

If we let x = the number of people who are 25 years or older, in millions, we can create the equation:

36/x = 3/2

3x = 72

x = 24

Therefore, the number of people who reside in Country Z is 36 + 24 = 60 million.

Answer: E
Moderators:
Bunuel
Math Expert
109813 posts
Krunaal
Tuck School Moderator
853 posts