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

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Joined: 07 Jun 2003
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A certain shade of gray paint is obtained by mixing 3 parts [#permalink]  24 Jul 2003, 17:35
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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 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?

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Joined: 04 Jun 2003
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2.5 gallons?

6/8 for the white paint- 1 gallon
10/8 for the black- 1.5 gallons

so 2.5 gallon would be the least.

2nd question is a good one!!
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