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There are 36 students in a student council in a school and the ratio of the number of boys to girls is 3:1 . How many more girls should be added to the council so that the ratio of boys to the number of girls may be 9:5

  • Math -

    36 students
    B:G = 3:1 = 27 : 9

    Add x girls,
    Solve for x by cross multiplication.

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