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 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 2601:30 AM EDT
-02:30 AM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.
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.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
12 May 2018, 14:14
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
75% (02:26) correct
25%
(02:41)
wrong
based on 773
sessions
History
Date
Time
Result
Not Attempted Yet
In the first consignment, 12% bulbs were faulty. In the second consignment, 4% bulbs were faulty.
In the two consignments, 7% bulbs were faulty. If the two consignments combined had 4000 bulbs,
how many faulty bulbs did the first consignment have?
A. 60
B. 100
C. 175
D. 180
E. 300
Source: Experts Global
In the two consignments, 7% bulbs were faulty. If the two consignments combined had 4000 bulbs,
how many faulty bulbs did the first consignment have?
A. 60
B. 100
C. 175
D. 180
E. 300
Source: Experts Global
28 Jun 2018, 01:03
Kudos
Bookmarks
QZ
Solution
Given:
- • In the first consignment, 12% bulbs were faulty
• In the second consignment, 4% bulbs were faulty
• In the two consignments, 7% bulbs were faulty
• The two consignments combined had 4000 bulbs
To find:
- • The number of faulty bulbs in the first consignment
Approach and Working:
We can use allegation to find the ratio of bulbs in each of the consignment, as follows:
Therefore, the total number of bulbs in the first consignment = \(4000 * \frac{3}{8} = 1500\)
- • Faulty bulbs in first consignment = 12% of 1500 = \(1500 * \frac{12}{100} = 180\)
Hence, the correct answer is option D.
Answer: D
General Discussion
12 May 2018, 18:31
Kudos
Bookmarks
pushpitkc
Weighted average, in which
\(x\) = number of bulbs in first consignment
\(4000 - x\) = number of bulbs in second consignment
\(.12(x) + .04(4000-x) = .07(4000)\)
\(.12x + 160 -.04x = 280\)
\(.08x = 120\)
\(x = \frac{120}{.08}=\frac{12000}{8}=1500\)
\(x\) is the number of bulbs in first consignment.
\(12\) percent are faulty
\(12\) percent of \(1500\) is
\(180\)
Answer D
The formula I used.
(%) = percent faulty
A = consignment #1
B = consignment #2
(% A)(# of A) + (% B)(# of B) = (% of A+B)(# of A+B)
