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    Question

    To do a certain work, the ratio of the efficiencies of A

    and B is 7 : 6. Working together, they can complete the same work in 21 days. What part of the same work will be completed by B alone in 26 days?
    A 5/8 Correct Answer Incorrect Answer
    B 4/7 Correct Answer Incorrect Answer
    C 5/6 Correct Answer Incorrect Answer
    D 2/3 Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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