Events & Promotions
| Last visit was: 09 Aug 2026, 12:13 |
It is currently 09 Aug 2026, 12:13 |
|
|
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.
Aug 0312:00 PM EDT
-11:59 PM EDT
Starting 8/3, save up to $1,000 on select GMAT prep. Achieve your b-school goals this fall with Manhattan Prep.
Aug 0512:00 PM EDT
-11:59 PM EDT
50% off all study plans with code ADVANCE - Expires Monday 8/10
Aug 0710:00 AM IST
-11:00 PM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 745+ score.
Aug 1008:00 PM EDT
-10:00 PM EDT
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Mon/Wed August 10, 2026 - Oct. 14, 2026, 8:00pm-10:00pm EST
Aug 1410:00 AM EDT
-11:00 AM EDT
Top Scores Start with a Elite Online Prep Course. Enroll for 6 months of access to over 400 hours of GMAT video lessons AND 715+ Score Guarantee!
Aug 1512:01 AM PDT
-11:59 PM PDT
On the 15th, GMAT Club Tests will be Free! Including all the Quizzes, Questions, and Tests. 12 AM - 11:59 PM PST
07 Jun 2024, 01:30
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
63% (01:50) correct
38%
(01:46)
wrong
based on 168
sessions
History
Date
Time
Result
Not Attempted Yet
Of the students in a class, 90% had taken a course in writing, or math, or both. What percent of the students had taken both a course in writing and a course in math?
(1) 55% of the students had taken a course in writing.
(2) 35% of the students had taken a course in only math.
(1) 55% of the students had taken a course in writing.
(2) 35% of the students had taken a course in only math.
07 Jun 2024, 03:44
Kudos
Bookmarks
IMO E,
Given - Of the students in a class, 90% had taken a course in writing, or math, or both.
Assuming A - % of students taking course writing, B - % student taking course math and there are 100 students in class.
Therefore given is n(AUB) = 90. which is equal to n(A) + n(B) - n(A∩B)
Lets calculate the percent of the students had taken both a course in writing and a course in math (n(A∩B)) from given conditions.
1st - 55% of the students had taken a course in writing.
Therefore, n(A) = 55
n(AUB) = n(A) + n(B) - n(A∩B)
90 = 55 + n(B) - n(A∩B)
35 = n(B) - n(A∩B)
there is nothing about n(B) hence not sufficient.
2nd - 35% of the students had taken a course in only math.
Therefore, n(B) - n(A∩B) = 35
which is same data we got through statement 1 hence not sufficient.
and, even after combining both we are still not getting value for n(A∩B).
Given - Of the students in a class, 90% had taken a course in writing, or math, or both.
Assuming A - % of students taking course writing, B - % student taking course math and there are 100 students in class.
Therefore given is n(AUB) = 90. which is equal to n(A) + n(B) - n(A∩B)
Lets calculate the percent of the students had taken both a course in writing and a course in math (n(A∩B)) from given conditions.
1st - 55% of the students had taken a course in writing.
Therefore, n(A) = 55
n(AUB) = n(A) + n(B) - n(A∩B)
90 = 55 + n(B) - n(A∩B)
35 = n(B) - n(A∩B)
there is nothing about n(B) hence not sufficient.
2nd - 35% of the students had taken a course in only math.
Therefore, n(B) - n(A∩B) = 35
which is same data we got through statement 1 hence not sufficient.
and, even after combining both we are still not getting value for n(A∩B).
07 Jun 2024, 11:34
Kudos
Bookmarks
If we could somehow determine what percentage of students had taken a course in only math and in only writing, then we will be able to determine what percent of the students had taken both a course in writing and a course in math.
According to statement 1, 55% of the students had taken a course in writing. So, there might be students who have taken course in math as well. So, A is not sufficient and answer choice A & D are out.
According to statement 2, 35% of the students had taken a course in only math. But, based on this information, we are unable to determine the percentage of students had taken a course in only writing. So, answer choice B is not sufficient. We are left with C & E answer choices only.
If we combine statements 1 & 2, still there is no way to determine what percent of the students had taken a course in only math and in only writing. So, choice C is also Out.
In my opinion, E would be the answer for this problem.
According to statement 1, 55% of the students had taken a course in writing. So, there might be students who have taken course in math as well. So, A is not sufficient and answer choice A & D are out.
According to statement 2, 35% of the students had taken a course in only math. But, based on this information, we are unable to determine the percentage of students had taken a course in only writing. So, answer choice B is not sufficient. We are left with C & E answer choices only.
If we combine statements 1 & 2, still there is no way to determine what percent of the students had taken a course in only math and in only writing. So, choice C is also Out.
In my opinion, E would be the answer for this problem.
Moderators:
