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PS MIXTURE WORLD PROBLEMS

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PS MIXTURE WORLD PROBLEMS [#permalink] New post 05 Jun 2005, 15:24
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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
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Re: PS MIXTURE WORLD PROBLEMS [#permalink] New post 05 Jun 2005, 15:35
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, 15:35
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