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      Question

      A can complete a job in 15 days; B in 20 days. They work

      together for 5 days. What fraction remains?
      A 5/12 Correct Answer Incorrect Answer
      B 11/12 Correct Answer Incorrect Answer
      C 4/13 Correct Answer Incorrect Answer
      D 19/11 Correct Answer Incorrect Answer

      Solution

      ATQ,

      In 1 day they do (1/15 + 1/20 = 7/60).

      In 5 days = 35/60 = 7/12. Remaining = 1 – 7/12 = 5/12

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