Mixtures And Allegations

Step 1: Initial Mixture Calculation.
Initially, the container has 60 litres of milk. A removes 4 litres of milk and replaces it with 4 litres of water. Thus, the amount of milk in the mixture is litres, and the amount of water is 4 litres.

Step 2: B's Sale and Addition of Water.
B sells 30 litres of the mixture. The proportion of milk in the mixture is , and the proportion of water is . In the 30 litres sold, the amount of milk is litres, and the amount of water is litres. After selling 30 litres, the remaining mixture has litres of milk and litres of water. B then adds 5 litres of water, making the total water in the mixture litres.

Step 3: Final Ratio.
The remaining mixture consists of 28 litres of milk and 7 litres of water. Thus, the ratio of milk to water is .

Final Answer: