Mathematics

Question

In science class, the girl to boy ratio is 3 to 7.
If there are 50 students total in the class, how many are boys

2 Answer

  • I would say that there are 29 boys in the class.
  • Answer:

    There are 35 boys in the class.

    Step-by-step explanation:

    This question can be solved as a rule of three.

    In science class, the girl to boy ratio is 3 to 7.

    This means that for each 10 students, 7 of them are boys and 3 are girls.

    So if for 10 students, 7 of them are boys, how many are boys for 50?

    7 boys - 10 students

    x boys - 50 students

    [tex]10x = 7*50[/tex]

    [tex]10x = 350[/tex]

    [tex]x = 35[/tex]

    There are 35 boys in the class.

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