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A vessel contains a mixture of two liquids A and B in the [#permalink]
21 Feb 2004, 15:23
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A vessel contains a mixture of two liquids A and B in the ratio of 7:5. If 9 litres of the mixture is replaced by 9 ltrs of liquid B, then the ratio of the two liquids becomes 7:9. How much of the liquid A was there in the vessel?