Exams › SSC CGL (Prelims) › General

Two tanks, X and Y, contain mixtures of milk and water. Tank X has them in the ratio 3:1, while Tank Y has them in the ratio 7:3. If 12 litres are taken from X and 18 litres from Y and mixed in a third tank, what is the ratio of milk to water in the new mixture?

1. 18:7
2. 4:1
3. 5:2
4. 11:4

Correct answer: 18:7

Solution

From tank X, 12 litres in the ratio 3:1 gives 9 litres milk and 3 litres water. From tank Y, 18 litres in the ratio 7:3 gives 12.6 litres milk and 5.4 litres water. Total milk = 21.6 and water = 8.4, so the ratio is 18:7.

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