A solution has 60% milk and rest water. If 10% of it is removed and replaced with water thrice, what is the percentage of milk left in the solution?

From a can containing milk, 10% is removed and replaced with water. Next 11.11% of the solution is removed and replaced with water. Further 12.5% of the solution is removed and replaced with water. What is the percentage of milk in the solution now?

From a solution containing milk and water in the ratio 2 : 3, 15 litres of solution is removed and replaced with 15 litres of milk. This operation is done once more. Now the ratio of milk to water is 7 : 5. Find the volume of the initial solution.

From 100 litres of milk, 10 litres of water is added and then 20 litres of solution is removed. Next 30 litres of the water is added and 20 litres of solution is removed. Find the amount of milk, in litres, in the solution now.

21. 12.5% of a solution having milk and water in the ratio 24 : 25 is removed and replaced with water. Find the ratio of milk and water in the solution if this operation is done a total of three times.

1. 21 : 64 2. 27 : 64 3. 8 : 27 4. 27 : 33 5. 21 : 43

22. Rahul removes a fraction of undiluted spirit and replaces it with water to avoid detection. He does so on two continuous days. If spirit now accounts for only 64% of the solution, what fraction of solution did he remove daily?