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A tank was full of pure milk. Half of mi...

A tank was full of pure milk. Half of milk was sold and then the tank was refilled with water. Again half of milk (mixture) was sold and the tank was refilled with water and now for the third time half of milk was sold and tank was refilled with water. In the last what will be the percentage of milk?

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The correct Answer is:
`12.5` %
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