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      Question

      A container has 64 litres of milk. 16 litres of milk is

      removed and replaced with water. This process is repeated three times. How much milk is left?
      A 58 litres Correct Answer Incorrect Answer
      B 27 litres Correct Answer Incorrect Answer
      C 32 litres Correct Answer Incorrect Answer
      D 65 litres Correct Answer Incorrect Answer

      Solution

      Each time, milk left becomes 64 - 16 = 48 litres out of 64 So fraction of milk left each time = 48/64 = 3/4 After 3 repetitions: Milk left = 64 x (3/4)^3 = 64 x 27/64 = 27 litres

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