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# PS MIXTURE WORLD PROBLEMS

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Senior Manager
Joined: 30 May 2005
Posts: 277
Followers: 1

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PS MIXTURE WORLD PROBLEMS [#permalink]  05 Jun 2005, 14:24
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.HI does anyone have a clue thanks

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) 2 1/2
(C) 3
(D) 3 1/2
(E) 4
Director
Joined: 18 Apr 2005
Posts: 549
Location: Canuckland
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Re: PS MIXTURE WORLD PROBLEMS [#permalink]  05 Jun 2005, 14:35
mandy wrote:
.HI does anyone have a clue thanks

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) 2 1/2
(C) 3
(D) 3 1/2
(E) 4

we need 3/4 gallons of white and 5/4 gallons of black so we need to buy
1 gallon of white and 1.5 gallons of black => 2.5 gallons total, B.
Re: PS MIXTURE WORLD PROBLEMS   [#permalink] 05 Jun 2005, 14:35
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