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    Question

    A book needs to be typed. A types it in 15 days. B types

    it in 12 days. C types in 20 days. D types in 8 days. If A and D work together as team VENUS, B and C work as team MERCURY, and A and C work as team MARS, which of these three teams will complete typing the book first?
    A MARS Correct Answer Incorrect Answer
    B VENUS Correct Answer Incorrect Answer
    C All teams take the same time Correct Answer Incorrect Answer
    D MERCURY Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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