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6 March, 04:47

The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How many students are boys?

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Answers (2)
  1. 6 March, 06:02
    0
    There are 15 boys.

    Step-by-step explanation:

    b = Boys

    g = Girls

    Set an Equation

    b/g = 3/5

    b + g = 40

    Put 40 in for g

    b/40 - b = 5b

    Simplify

    3 (40 - b) = 5b

    Simplify

    120 - 3b = 5b

    Simplify

    8b = 120

    Simplify

    4b = 60

    Simplify

    b = 15
  2. 6 March, 06:44
    0
    Answer: 15 boys

    Step-by-step explanation:

    3 + 5 = 8

    3/8*40 = 15

    5/8*40=25

    15:25

    There are 15 boys.
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