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a certain shade of gray paint is obtained by mixing 3 parts [#permalink]
14 Sep 2004, 19:04
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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 only be purchased in one gallon or half gallon cans, what is the last amount of paint, in gallons, that must be purchased in order to measure the portions needed for the mixture?