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The freezing point of a diluted milk sample is found to be –0.2°C, while it should have been –0.5°C for pure milk. How much water has been added to pure milk to make the diluted sample?

1. 1 cup of water to 2 cups of pure milk
2. 2 cups of water to 3 cups of pure milk
3. 3 cups of water to 2 cups of pure milk
4. 1 cup of water to 3 cups of pure milk

Correct answer: 3 cups of water to 2 cups of pure milk

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