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
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GMAT score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
It appears that you are browsing the GMAT Club forum unregistered!
Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club
Registration gives you:
Tests
Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.
Applicant Stats
View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more
Books/Downloads
Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
A certain shade of gray paint is obtained by mixing 3 parts [#permalink]
25 Apr 2006, 12:18
This topic is locked. If you want to discuss this question please re-post it in the respective forum.
. A certain shade of gray paint is obtained by mixing 3 parts of white paint with 5 parts of black paint. If 2 gallons of the mixture is needed and the individual colors can be purchased only in one-gallon or half- gallon cans, what is the least amount of paint, in gallons, that must be purchased in order to measure out the portions needed for the mixture?
(A) 2
(B)
(C) 3
(D)
(E) 4
Can somebody please explian
From the Question
2 W + 5 B = 7G
To make 2G we need at least the following
W = 4/7= 0.5.. G
B = 10/7 = 1.4...
Since the amount is availabe only in 0.5 or 1 G
W = 1 B= 1.5 Total = 2.5
But since you have answer Choices have 3 the answer should be C.
White in the mixture is 3/8*Gallons
Black in the mixture is 25/8*Gallons
For 2 gallons of mixture, white needed is 3/4 G, and Black needed is 5/4 G.
3/4 Gallon, just buy one 1 gallon of white, and for black(5/4G), buy one 1 g and one 0.5 g.
We're told we need 2 gallons of gray paints. So these 8 parts represent 2 gallons. Therefore, 1 part = 0.25 gallons. We can now tell that we need 0.75 gallons of white paint and 1.25 gallons of black paint.
The paints are available in 1 gallon or 1/2 gallon cans. For the white paint, we can't buy the 1/2 gallon can as we need 0.75 gallons. So we will need to buy a 1 gallon can of white paint. The same reason applies to the black paint, we will ned a 1 gallon can of black paint, and a 1/2 gallon can of black paint.
The least amt we need to purchase is therefore 2.5 gallons.