Others Maths Puzzle

20 litres of a mixture contains milk and water in the ratio 3:2. 10 litres of the mixture was removed and replaced with pure milk. Then the procedure was repeated once. At the end of two replacements what is the ratio of milk & water?

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20 liter mixture with milk and water in the ratio of 3:2
Milk = 3/5(20) = 12L
Water = 2/5(20) = 8L
Remove 10L of Mixture so Milk = 1/2(12L) = 6L, Water = 1/2(8L) = 4L
Add 10L of milk, Milk = 16L & Water = 4L
Repeating the procedure Milk = 8L & Water = 2L.
Add 10L of milk, Milk = 18L & Water = 2L.
Therefore the ratio of Milk and Water = 18:2 = 9:1
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