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    Question

    In a classroom, the ratio of the number of boys, girls, and

    teachers is 5:4:1, respectively, and the average number of people in each category is 50. What is the average number of boys and girls in the classroom?
    A 92 Correct Answer Incorrect Answer
    B 67.5 Correct Answer Incorrect Answer
    C 55.4 Correct Answer Incorrect Answer
    D 70 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the number of boys in the classroom = ‘5x’

    Then, the number of girls in the classroom = ‘4x’

    And, the number of teachers in the classroom = ‘x’

    According to the question,

    Image

    So, the average number of boys and girls =

    Image

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