It is currently 23 Oct 2017, 12:37

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

we will pick new questions that match your level based on your Timer History

Track

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A certain shade of gray paint is obtained by mixing 3 parts

Author Message
Manager
Joined: 05 Jul 2006
Posts: 195

Kudos [?]: 76 [0], given: 0

A certain shade of gray paint is obtained by mixing 3 parts [#permalink]

Show Tags

08 Sep 2006, 19:35
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

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?

Kudos [?]: 76 [0], given: 0

VP
Joined: 02 Jun 2006
Posts: 1257

Kudos [?]: 107 [0], given: 0

Show Tags

08 Sep 2006, 19:59
Ratio of white to black = 3/5

To get 2 gallons,

3x + 5x = 2

x = 2/8 = 1/4 = 0.25

Required White Paint = 0.75
Required Black Paint = 1.25

Paint can be purchased only in 1 gallon or 0.5 gallon sizes.

White Purchase = 1 gallon
Black Purchase = 1.5 gallons

Kudos [?]: 107 [0], given: 0

CEO
Joined: 20 Nov 2005
Posts: 2892

Kudos [?]: 324 [0], given: 0

Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

Show Tags

08 Sep 2006, 22:21
White required = 2*3/8 = 3/4 - Must purchase 1 gallon
Black required = 2*5/8 = 5/4 - Must purchase 1.5 gallons

Total to be purchased = 2.5 gallons
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Kudos [?]: 324 [0], given: 0

Current Student
Joined: 29 Jan 2005
Posts: 5204

Kudos [?]: 434 [0], given: 0

Show Tags

09 Sep 2006, 04:11
haas_mba07 wrote:
Ratio of white to black = 3/5

To get 2 gallons,

3x + 5x = 2

x = 2/8 = 1/4 = 0.25

Required White Paint = 0.75
Required Black Paint = 1.25

Paint can be purchased only in 1 gallon or 0.5 gallon sizes.

White Purchase = 1 gallon
Black Purchase = 1.5 gallons

Textbook explanation

Kudos [?]: 434 [0], given: 0

Intern
Joined: 23 Aug 2006
Posts: 8

Kudos [?]: 1 [0], given: 0

Show Tags

09 Sep 2006, 08:32
0.75 W & 1.25 B- Since only 1 Gallon and 1/2 gallon are available,

we need 1 G White & 1.5 G Black totalling to 2.5 Gallon

Kudos [?]: 1 [0], given: 0

09 Sep 2006, 08:32
Display posts from previous: Sort by