Question

    A, B and C can do a piece of work in 10, 12 and 15

    days,  respectively. In how many days can B do the work, if he is  assisted by A and C together on alternate days?  
    A 5 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 6 Correct Answer Incorrect Answer
    D 3 Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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