A 50 litre mixture has milk and water in the ratio 3 : 2. If 10 litres of the mixture are removed and replaced with water, what is the new ratio of milk to water?
Correct answer D. 12:13
Explanation
Removing 10 litres takes 6 litres milk and 4 litres water, leaving 24 and 16. Adding 10 litres water gives 24 : 26 = 12 : 13.
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