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.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2510:00 AM EST
-11:00 AM EST
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors.
Dropdown 1: 20th
Dropdown 2: more than 150%
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
22% (02:50) correct
78%
(02:44)
wrong
based on 183
sessions
History
Date
Time
Result
Not Attempted Yet
The chart shows the percentage of the total population of Country X, measured at the end of each century, living in each of its four regions (Lowland, Highland, Coastal, and Desert). In each century, the population of every region increased compared with the prior century.
From each drop-down menu, select the option that creates the most accurate statement based on the information given.
The largest percentage increase in the total population from one century to the next occurred in the Century, when the total population increased by .
Attachment:
GMAT-Club-Forum-x8kdoala.png [ 26.78 KiB | Viewed 1406 times ]
ShowHide Answer
Official Answer
Dropdown 1: 20th
Dropdown 2: more than 150%
Bunuel
To determine the increase in total population from one century to the next, focus on the region whose share decreased the most. Since every region’s population increased, a decline in share means that the total must have risen enough to offset this growth.
• 17th to 18th Century: Desert fell from 50% to 40%. Suppose the total population in the 17th Century was 100, so Desert had 50 people. In the 18th Century, Desert’s population was more than 50, which represented 40% of the new total. For 40% to exceed 50, the new total must have been more than 125, implying an increase of more than 25%.
• 18th to 19th Century: Desert fell from 40% to 25%. If the 18th-Century total was 100, then Desert had 40 people. In the 19th Century, 25% had to exceed 40, so the new total had to be more than 160, which means an increase of more than 60%.
• 19th to 20th Century: Desert fell from 25% to 10%. If the 19th-Century total was 100, then Desert had 25 people. In the 20th Century, 10% had to exceed 25, so the new total had to be more than 250. This means the population increased by more than 2.5 times, which corresponds to an increase of more than 150%.
Thus, the largest increase occurred in the 20th Century, when the total population rose by more than 150% compared with the 19th Century.
I29-162
General Discussion
18 Sep 2025, 10:59
Kudos
Bookmarks
Hi Bunuel , Im a confused why the second part is more than 150%, actually im confused how can we even tell anything about the total population from a graph of relative populations that are all increasing and always add upto 100 ?
