An 84-litre mixture has milk and water in the ratio 5:2. If 21 litres of the mixture is removed and 12 litres of pure milk is added, what is the new ratio of milk to water?

उत्तर देखें और व्याख्या

उत्तर: (C) 19:6

व्याख्या

Milk 60, water 24; removing 21 L leaves 45 : 18; adding 12 milk gives 57 : 18 = 19 : 6.