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 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.
Apr 2912:30 AM EDT
-01:30 AM EDT
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Apr 3001:30 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.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
May 0306:30 AM PDT
-08:30 AM PDT
Verbal trouble on GMAT? Fix it NOW! Join Sunita Singhvi for a focused webinar on actionable strategies to boost your Verbal score and take your performance to the next level.
25 Nov 2018, 22:24
Kudos
Bookmarks
E
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:
54% (01:51) correct
46%
(01:35)
wrong
based on 383
sessions
History
Date
Time
Result
Not Attempted Yet
A solution of acid and water is A% acid. Another solution of acid and water is B% acid. X litres of first solution is mixed with Y litres of second solution to form a new mixture of acid and water. What is the percentage of acid in the new mixture?
(1) Ratio of A:B = 5:4.
(2) Ratio of X:Y = 2:3.
(1) Ratio of A:B = 5:4.
(2) Ratio of X:Y = 2:3.
28 Nov 2018, 12:46
Kudos
Bookmarks
Let the final percentage of acid in new mixture = k
A---------------B
-------k----------
k-B------------A-k
It implies that first acid solution and second acid solution should be mixed in a ratio of \(\frac{(k-B)}{(A-k)}\)
Given that X liters of first solution is mixed with Y liters of second solution
\(\frac{(k-B)}{(A-k)}\)= \(\frac{X}{Y}\)
\(Yk - YB = XA - Xk\)
\(k\)= \(\frac{(XA + YB)}{(Y + X)}\)
\(k\)= \(( (\frac{X}{Y})*A +B ) / (1 + \frac{X}{Y})\)
It is clear that we need \(\frac{X}{Y}\) , A and B to solve for k.
First Statement :
\(\frac{A}{B}\) = \(\frac{5}{4}\) -> INSUFFICIENT
Second Statement :
\(\frac{X}{Y}\) = \(\frac{2}{3}\) -> Still we need A and B. So INSUFFICIENT.
First + Second Statements:
k cannot be solved unless we know one of A and B. -> INSUFFICIENT
Therefore, Answer = E
A---------------B
-------k----------
k-B------------A-k
It implies that first acid solution and second acid solution should be mixed in a ratio of \(\frac{(k-B)}{(A-k)}\)
Given that X liters of first solution is mixed with Y liters of second solution
\(\frac{(k-B)}{(A-k)}\)= \(\frac{X}{Y}\)
\(Yk - YB = XA - Xk\)
\(k\)= \(\frac{(XA + YB)}{(Y + X)}\)
\(k\)= \(( (\frac{X}{Y})*A +B ) / (1 + \frac{X}{Y})\)
It is clear that we need \(\frac{X}{Y}\) , A and B to solve for k.
First Statement :
\(\frac{A}{B}\) = \(\frac{5}{4}\) -> INSUFFICIENT
Second Statement :
\(\frac{X}{Y}\) = \(\frac{2}{3}\) -> Still we need A and B. So INSUFFICIENT.
First + Second Statements:
k cannot be solved unless we know one of A and B. -> INSUFFICIENT
Therefore, Answer = E
mattisweb
Joined: 30 Jul 2024
Last visit: 06 Feb 2026
Posts: 33
Own Kudos:
Given Kudos: 14
Location: Germany
Concentration: General Management, Operations
Schools: Sloan (MIT) (D)
GMAT Focus 1: 745 Q88 V87 DI86 
GPA: 4.0
WE:Supply Chain Management (Student)
19 Aug 2025, 09:24
Kudos
Bookmarks
Why would we need to use k? If I have a bottle of beer with 5% alcohol, then that means that 5% of the final solution is made up of alcohol, given that the other component is 0% alcohol (or acid). Therefore, the final mixture for each case is already given.
