The task is to generate the correct answer for a given math problem.

Q: Problem: when the price of a product was decreased by 20 % , the number sold increased by 60 % . what was the effect on the total revenue ?

A: 28 %
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Q: Problem: find the area of a parallelogram with base 10 cm and height 20 cm .

A: 200
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Q: Problem: 30 liters of a mixture contains milk and water in the ratio 2 : 1 . if 5 liters of this mixture be replaced by 5 liters of milk , the ratio of milk to water in the new mixture would be ?

A:
5 : 2
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