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.
10 Nov 2021, 02:30
Kudos
Bookmarks
C
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:
92% (01:09) correct
8%
(01:01)
wrong
based on 86
sessions
History
Date
Time
Result
Not Attempted Yet
The first-year MBA class at XYZ University is composed of 60 male students and 40 female students. How many male students from the first-year class are taking economics?
(1) Fifty percent of the first-year class is taking economics.
(2) 10 female students from the first-year class are not taking economics.
(1) Fifty percent of the first-year class is taking economics.
(2) 10 female students from the first-year class are not taking economics.
asishron29181
Joined: 04 May 2020
Last visit: 04 Nov 2022
Posts: 185
Given Kudos: 68
Location: India
Schools: Great Lakes (I)
GMAT 1: 610 Q47 V27
WE:Programming (Computer Software)
10 Nov 2021, 02:58
Kudos
Bookmarks
The first-year MBA class at XYZ University is composed of 60 male students and 40 female students. How many male students from the first-year class are taking economics?
(1) Fifty percent of the first-year class is taking economics.
This implies a total of 50 children have taken economics. But we don't have the exact count of males and females opting for economics.
It could be 50 males and 0 females opting for economics or 30 males and 20 females opting for economics.
Not sufficient.
(2) 10 female students from the first-year class are not taking economics.
Female taking economics = 30
But we don't have any information about the males.
Not sufficient.
Combining both,
Female economics =30
total population opting economics = 50
Male opting for economics= 20
Sufficient.
IMO C
(1) Fifty percent of the first-year class is taking economics.
This implies a total of 50 children have taken economics. But we don't have the exact count of males and females opting for economics.
It could be 50 males and 0 females opting for economics or 30 males and 20 females opting for economics.
Not sufficient.
(2) 10 female students from the first-year class are not taking economics.
Female taking economics = 30
But we don't have any information about the males.
Not sufficient.
Combining both,
Female economics =30
total population opting economics = 50
Male opting for economics= 20
Sufficient.
IMO C
GMATCoachBen
Expert
Tutor
Joined: 21 Mar 2017
Last visit: 19 Nov 2025
Posts: 465
Given Kudos: 210
Status:Professional GMAT Trainer
Affiliations: GMAT Coach
Location: United States (WA)
GMAT Focus 1: 775 Q87 V90 DI88 (Online)
GMAT 1: 760 Q50 V44
GMAT 2: 770 Q51 V44
GMAT 3: 770 Q50 V44
GMAT 4: 770 Q50 V45 (Online)
GMAT 5: 780 Q51 V48
Expert reply
10 Nov 2021, 20:39
Kudos
Bookmarks
Bunuel
The "male... female" is a clue that this is an Overlapping Sets problem.
As always, rephrase what it's asking for — we are looking for the "Both" value (both male and taking economics).
Method A: Use the Overlapping Sets formula
T (Total) = X (Group 1) + Y (Group 2) - B (Both) + N (Neither)
From the stem, we know:
T = full total = 60 + 40 = 100
X = total males = 60
Y = total taking economics
B = both male and economics
N = neither male nor economics (female and not economics)
So, we have 1 equation, with 3 unknown variables. If we are given two of those variables in the statements, we can solve for the final variable.
(1) Y = 50. But we still have 2 variables and 1 equation. Insufficient.
(2) N = 10. But we still have 2 variables and 1 equation. Insufficient.
Together: Since we know Y and N, we now just have 1 variable and 1 equation, so we can solve for B. Sufficient. Answer is C.
Method B: Draw the Overlapping Sets Table 👇
Note that, as a habit, I use a check mark (in green below) in place of calculations — to save time on DS, we don't need the actual numbers. If we know 2 of the 3 values in any of the rows or columns, we also know the 3rd value.
Below, I've drawn 3 tables for clarity, but on the test I'd just draw the "Together" table — I write "1)" or "2)" (in orange below) next to the numbers from each statement when I put them in the table. We have to make sure to evaluate each statement separately — when I evaluate statement 2 alone, I visualize erasing the info I've written for statement 1.
Attachments
2021-11-10 19_43_14-Overlapping Sets table— The first-year MBA class a - OneNote.png [ 162.2 KiB | Viewed 1616 times ]
