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    Question

    In a class, the ratio of the number of boys to that of

    girls is 2 : 3. The ratio of the number of students who passed to the number of those who failed is 5 : 3. Among boys, the ratio of the number of those who failed to the number of those who passed is 3 : 1. What is the ratio of the number of girls who failed to those who passed?
    A 1 : 5 Correct Answer Incorrect Answer
    B 1 : 7 Correct Answer Incorrect Answer
    C 2 : 7 Correct Answer Incorrect Answer
    D 2 : 5 Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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