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    Question

    10 persons begin to work together on a job, but after

    some days, 4 persons leave. As a result, the job, which could have been completed in 40 days, was completed in 50 days. How many days after commencement of the work did the four persons leave?
    A 25 Correct Answer Incorrect Answer
    B 24 Correct Answer Incorrect Answer
    C 30 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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