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.
Jul 0901:00 PM EDT
-02:00 PM EDT
More Target Test Prep students are earning 100th percentile GMAT scores. Don’t settle for less when the Target Test Prep course gives you everything you need to score high on the GMAT. Start your 5-day free trial today.
Jul 1311:00 AM EDT
-12:30 PM EDT
Looking for your GMAT motivation to break through the score plateau? Pragati improved her score by massive 160 points with strategic guidance and hard-work! Find out how personalized mentorship and a strong mindset can turn GMAT struggles into success.
Jul 1508:00 PM PDT
-09:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Jul 1609:30 AM EDT
-11:30 AM EDT
Is INSEAD your dream b-school and you're looking for solid prep and application strategies to get there? Check out Barkavi’s end-to-end journey to know how she did! Get insights into the INSEAD admissions process, know what Adcoms look at, and more!
Jul 1611:00 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.
Jul 1911:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment
29 Jan 2019, 08:52
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
68% (02:25) correct
32%
(02:22)
wrong
based on 466
sessions
History
Date
Time
Result
Not Attempted Yet
A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal proportions. What is the value of x?
A. 6 litres
B. 10 litres
C. 15 litres
D. 20 litres
E. 30 litres
A. 6 litres
B. 10 litres
C. 15 litres
D. 20 litres
E. 30 litres
29 Jan 2019, 11:02
Kudos
Bookmarks
Bunuel
A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal proportions. What is the value of x?
A. 6 litres
B. 10 litres
C. 15 litres
D. 20 litres
E. 30 litres
A. 6 litres
B. 10 litres
C. 15 litres
D. 20 litres
E. 30 litres
A great weighted average method above by VeritasKarishma..
But let me give you another method..
M:W=2:3 means M = \(\frac{2}{5}\) and W=\(\frac{3}{5}\)
Total 60 liters means M = \(\frac{2}{5}*60=24\) and W=\(\frac{3}{5}*60=36\)
To be equal both should be 30 each, so a decrease of 6 liters of water from initial 36 liters...
Now if reduction of 1 liter would mean reduction of \(\frac{3}{5}\) of water, reduction of x liter would mean \(\frac{3}{5}*x\), but this should be equal to 6..
thus \(\frac{3}{5}*x=6.....x=\frac{5}{3}*6=10\)
B
Bunuel
A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal proportions. What is the value of x?
A. 6 litres
B. 10 litres
C. 15 litres
D. 20 litres
E. 30 litres
A. 6 litres
B. 10 litres
C. 15 litres
D. 20 litres
E. 30 litres
Conc of milk in mixture (C1) = 2/5
Conc of milk in pure milk (C2) = 1
Conc of milk in new mix (Cavg) = 1/2
w1/w2 = (1 - 1/2) / (1/2 - 2/5) = (1/2) / (1/10) = 5/1
So original mixture was 5 parts and pure milk was 1 part to get equal proportions of milk and water. Total 6 parts is actually 60 litres which means the 5 parts are 50 litres and 1 part is 10 litres.
Hence 10 litres of original mix was replaced with pure milk.
Answer (B)
