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 2212:30 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 1612:00 PM EDT
-11:59 PM EDT
You’re first to know: Save $200 on GMAT prep starting tomorrow, 4/13. Get 6 official practice tests and study with real questions. Be ready to save!
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 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
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.
27 Mar 2020, 05:29
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (02:01) correct
22%
(02:15)
wrong
based on 214
sessions
History
Date
Time
Result
Not Attempted Yet
A and B are two alloys of gold and copper prepared by mixing metals in proportions 5: 3 and 5: 11 respectively. If equal quantities of this alloys are melted to a third alloy C, what would be the proportion of gold and copper in the alloys thus formed?
A. 25: 33
B. 33: 25
C. 15: 17
D. 17: 15
E. 17: 16
A. 25: 33
B. 33: 25
C. 15: 17
D. 17: 15
E. 17: 16
27 Mar 2020, 14:42
Kudos
Bookmarks
Bunuel
Alloy A: For every 8 parts, 5 are gold (5/8). That means for for every 8 parts, 3 are copper (3/8).
Alloy B: For every 16 parts, 5 are gold (5/16). That means that for every 16 parts, 11 are copper (11/16)
To find the ratio of gold and copper in C, we need to divide the total amount of gold in both alloys by the total amount of copper in both alloys:
(5/8 + 5/16)/(3/8 + 11/16) = 15/17, so the correct answer is (C).
27 Mar 2020, 16:53
Kudos
Bookmarks
Bunuel
I see ratios in the answer choices, I'm choosing my own numbers.
The first alloy has a total of 8 parts (5 + 3), and the second alloy has 16 parts (5 + 11). So, we ought to choose a quantity that's a multiple of 16. Say that we have 16 ounces of alloy A, and 16 ounces of alloy B.
Therefore, alloy A contains 10oz of gold and 6oz of copper, and alloy B contains 5oz of gold and 11oz of copper.
Together, they contain 15oz of gold and 17oz of copper, for a ratio of 15:17. C.
