20 litres of a mixture contains milk and water in the ratio of 5 3 If 4 litre of this mixture is rep...........

Quantitative Aptitude (CDS) Ratio, Proportion

20 litres of a mixture contains milk and water in the ratio of 5 : 3. If 4 litre of this mixture is replaced by 4 litre of pure milk, what is the ratio of milk and water in the resultant?

4: 5

7: 4

6: 5

7 : 3

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Explanation:

20 - 4 = 16 litres, same ratio in milk and water.
milk : water = 5 : 3
milk = 5/8×16 = 10 litres and 6 litres water.
milk : water = 10+4 : 6 = 14 : 6 = 7 : 3