A mixture of 125 gallons of wine and water contains 20% water. How much water must be added to the mixture in order to increase the percentage of water to 25% of the new mixture?

10 gals

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8.5 gals

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8 gals

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8.33 gals

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Solution

The correct option is D 8.33 gals
In 125 gallons we have 25 gallons water and 100 gallons wine. To increase the percentage of water to 25%, we need to reduce the percentage of wine to 75%. This means that 100 gallons of wine = 75% of the new mixture. Thus the total mixture = 133.33 gallons. Thus, we need to mix 133.33 - 125 = 8.33 gallons of water in order to make the water equivalent to 25% of the mixture.

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