A can contains a mixture of two liquids A and B in the ratio 7 : 5. When 9 litre

Question

A 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 liquid A was contained by the can initially?

Options:

A . 10

B . 25

C . 20

D . 21

Answer: Option D

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