Two gallons of a mixture of water and sprit, water contain 15% of mixture. They are added to 3 gallons of another mixture of water and sprit, in which water contain 8% of mixture and half of a gallon water when added to the whole mixture find the water percentage in resulting mixture?

The first 2 gallons of mixture contain 15% water, which is 0.3 gallons, and the next 3 gallons contain 8% water, which is 0.24 gallons. Adding 0.5 gallons of pure water brings the total water to 0.3 + 0.24 + 0.5 = 1.04 gallons in a total of 5.5 gallons of mixture. The final percentage of water is (1.04 / 5.5) * 100 = 18 10/11%.

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