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.
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
Updated on: 02 Dec 2012, 09:08
Originally posted by ritumaheshwari02 on 02 Dec 2012, 06:53.
Last edited by ritumaheshwari02 on 02 Dec 2012, 09:08, edited 1 time in total.
Last edited by ritumaheshwari02 on 02 Dec 2012, 09:08, edited 1 time in total.
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
60% (02:31) correct
40%
(02:47)
wrong
based on 430
sessions
History
Date
Time
Result
Not Attempted Yet
Of the students at a certain high school, 90 percent took a course in algebra or geometry and 15 percent took courses in both. If the percent of students who took a course in algebra was 2 times the percent of students who took a course in geometry, what percent of the students took a course in algebra but not geometry?
A. 35%
B. 50%
C. 55%
D. 60%
E. 70%
A. 35%
B. 50%
C. 55%
D. 60%
E. 70%
02 Dec 2012, 08:16
Kudos
Bookmarks
Quote:
Let the total number of students be 100
A OR G = 90
A AND G = 15
A = 2G
(A OR G) = A + G - (A AND G)
90 = 2G + G - 15
=> 3G = 105
=> G = 35
=> A = 2G = 70
A AND NOTG = A - (A AND G) = 70 - 15 = 55
So, Answer will be C
Hope it helps!
General Discussion
07 Jun 2013, 02:58
Kudos
Bookmarks
Solved using overlapping sets:
Total No. of students taking algebra = a
Total No. of students taking geometry = g
Students taking both = 15
So from the information above,
Total No. of students taking only algebra = (a-15)
Total No. of students taking only geometry = (g-15)
Total No of students = (a-15) + (g-15) + 15 = 90;
So, a+g = 105
From the condition given, 2g = a, so substituting
a = 70 & Total No. of students taking only algebra = (a-15) = 55 %
Answer = C
Total No. of students taking algebra = a
Total No. of students taking geometry = g
Students taking both = 15
So from the information above,
Total No. of students taking only algebra = (a-15)
Total No. of students taking only geometry = (g-15)
Total No of students = (a-15) + (g-15) + 15 = 90;
So, a+g = 105
From the condition given, 2g = a, so substituting
a = 70 & Total No. of students taking only algebra = (a-15) = 55 %
Answer = C
