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 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Apr 2301:30 AM EDT
-02:30 AM EDT
Struggling with GMAT Verbal as a non-native speaker? Harsh improved his score from 595 to 695 in just 45 days—and scored a 99 %ile in Verbal (V88)! Learn how smart strategy, clarity, and guided prep helped him gain 100 points.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
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
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.
10 May 2019, 02:09
Kudos
Bookmarks
A
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:
40% (02:49) correct
60%
(02:44)
wrong
based on 141
sessions
History
Date
Time
Result
Not Attempted Yet
x boys can complete a work in 15 days and y girls can complete the same work in 24 days. Find the number of days taken to complete the work by (x – 8) boys and (y – 7) girls together.
Statement I: If the efficiency of boys is twice than that of girls and (x + y) = 27.
Statement II: If x = y, then the number of days taken by all the boys is half the number of days taken by all the girls
Statement I: If the efficiency of boys is twice than that of girls and (x + y) = 27.
Statement II: If x = y, then the number of days taken by all the boys is half the number of days taken by all the girls
16 May 2019, 21:16
Kudos
Bookmarks
Note down the formula: W=RT (Work = Rate * Time)
R of 1 boy - (1/m)
R of 1 girl - (1/n)
W of x boys = x*(1/m)*15 = 1
W of y girls = y*(1/n)*24 = 1
statement 1 --
GIVEN : boys take 1/2 the time as compared to girls and x+y = 27;
m= 2n; thus, these variables will be cancelled out.
using the 2 equations, values of x and y can be retrieved.
SUFFICIENT
statement 2 --
when x = y, boys take half the time as compared to girls;
there are 2 unknown variables and only one equation
INSUFFICIENT
ANSWER: A
R of 1 boy - (1/m)
R of 1 girl - (1/n)
W of x boys = x*(1/m)*15 = 1
W of y girls = y*(1/n)*24 = 1
statement 1 --
GIVEN : boys take 1/2 the time as compared to girls and x+y = 27;
m= 2n; thus, these variables will be cancelled out.
using the 2 equations, values of x and y can be retrieved.
SUFFICIENT
statement 2 --
when x = y, boys take half the time as compared to girls;
there are 2 unknown variables and only one equation
INSUFFICIENT
ANSWER: A
General Discussion
10 May 2019, 04:22
Kudos
Bookmarks
1 boy can do the work in day is 1/15 ...=> for x boys its x/15
1 girl can do the work in day is 1/24 ...=> for x boys its y/24
From Statement I: the efficiency of boys is twice than that of girls so x/15=2*y/24 also given x+y=27...from both eqns we get values of x,y so that we can get the number of days taken to complete the work by (x – 8) boys and (y – 7) girls together.....So A is sufficient
Just by seeing Statement II, its clearly visible that its insufficient since without knowing (x,y) values we cannot find the total work done. So options B,D,E,C rules out
OA: (A)
1 girl can do the work in day is 1/24 ...=> for x boys its y/24
From Statement I: the efficiency of boys is twice than that of girls so x/15=2*y/24 also given x+y=27...from both eqns we get values of x,y so that we can get the number of days taken to complete the work by (x – 8) boys and (y – 7) girls together.....So A is sufficient
Just by seeing Statement II, its clearly visible that its insufficient since without knowing (x,y) values we cannot find the total work done. So options B,D,E,C rules out
OA: (A)
