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6. One thousand liters of a solution was available, but the solution was 65% alcohol. Barry needed a solution which was 50% alcohol. How many liters of alcohol had to be extracted so that the solution would be 50% alcohol?
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Answer:

300 liters

Step-by-step explanation:

1000(0.65) = 650 liters of the solution was alcohol

1000.(1 - 0.65) = 350 liters was the other solute.

A 50% solution would have equal parts of each or 350 liters each.

650 - 350 = 300 liters of alcohol must be removed.