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.
Jun 1111:00 AM EDT
-01:00 PM EDT
TTP GMAT OnDemand gives serious students 400+ hours of expert video instruction, the full TTP course, AI support, weekly office hours, and a 715+ score guarantee—all built for elite GMAT score improvement.
Jun 1006:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
Jun 1101:30 AM EDT
-02:30 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.
Jun 1312:30 AM EDT
-01:00 AM EDT
Struggling to find the right strategies to score a 99 %ile on GMAT Focus? Riya (GMAT 715) boosted her score by 100-points in just 15 days! Discover how the right mentorship, tailored strategies, and an unwavering mindset can transform your GMAT prep.
Jun 1603:00 PM PDT
-04:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
Jun 2207:30 PM EDT
-09:30 PM EDT
Master the GMAT with expert live instruction, a personalized study plan, and real-time support. Includes 40 hours of online classes plus 6 months of access to the TTP GMAT OnDemand video course. Class date: Mon/Wed June 22, 2026 →August 26, 2026
16 Apr 2019, 09:27
Kudos
Bookmarks
B
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:
47% (02:47) correct
53%
(03:02)
wrong
based on 104
sessions
History
Date
Time
Result
Not Attempted Yet
A new employee in a mobile store has been assigned to mark defective pieces with red tags, and she has marked 45% of the mobile pieces defective. However, 30% of the pieces that are supposed to be marked working are now marked defective, and 40% of the pieces that are supposed to be marked defective are marked working. What percent of the pieces that are marked defective are supposed to be marked working?
A. 30%
B. 33.33%
C. 37.5%
D. 40%
E. 45%
A. 30%
B. 33.33%
C. 37.5%
D. 40%
E. 45%
16 Apr 2019, 19:29
Kudos
Bookmarks
btrg
Let the number of defective and working be d and w, and total be 100, so d+w=100..
30% of the pieces that are supposed to be marked working are now marked defective, so 0.3w, and 40% of the pieces that are supposed to be marked defective are marked working, that is the remaining 60% are marked defective, so 0.6d.. Thus 0.3w+0.6d=45....3w+6d=450....w+2d=150
Subtract w+d=100 from w+2d=150.....w+2d-(w+d)=150-100...d=50..
So both w and d are 50 each...
Also, 30% of working and 60% of defective equalling 45% would mean defective=working=50% through weighted average method. (45-30)/(60-30)=1/2 or 50%
Now we have to find 'What percent of the pieces that are marked defective are supposed to be marked working' means 30% of 50 is what percent of 45.....30% of 50 = 50*(30/100)=15.. so 100*15/45=33.33%
B.
Also the conversion of such statements into equations can be done without errors by AXIOMS, a concept I think Math revolution teaches.
16 Apr 2019, 19:59
Kudos
Bookmarks
btrg
let total pieces = 40
45% of the mobile pieces defective = 18 pieces
30% of the pieces that are supposed to be marked working are now marked defective = .30*40 ; 12 pieces are OKAY but are marked defective
40% of the pieces that are supposed to be marked defective are marked working; .4*40 ; 16 pieces
What percent of the pieces that are marked defective are supposed to be marked working
12/18; 66.66% i.e working pieces ~33%
IMO B
