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      Question

      A, B and C can do a work on their own in 5, 10 and 15 days respectively. Calculate the time required by B and C to do it together.

      A 12 days Correct Answer Incorrect Answer
      B 8 days Correct Answer Incorrect Answer
      C 5 days Correct Answer Incorrect Answer
      D 6 days Correct Answer Incorrect Answer

      Solution

      The correct answer is D

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