Math

The ratio of boys to girls in a math class is 5 to 3. When 3 girls and 1 boy join the class, the ratio becomes 4:3. What is the least possible number of students in the class after the new students join?

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  1. let number of boys be 5x
    let numbe of girls be 3x

    after change:
    boys --- 5x+1
    girls --- 3x+3

    (5x+1)/(3x+3) = 4/3
    15x + 3 = 12x + 12
    3x = 9
    x = 3

    new class :
    boys = 16
    girls = 12
    total = 28

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    posted by Reiny

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