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Q: can contains a mixture of two liquids A and B in the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of the liquid A was contained by the can initially?
A. 10 B. 21
C. 20 D. 25

Answer and Explanation

Answer:21

Explanation:

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