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  • 24-11-2020
  • Mathematics
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The ratio of boys to girls in math classes is 3.5. If there are 130 girls in these classes, how many boys must there be?

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Аноним Аноним
  • 24-11-2020

Answer:

Required Answer:-

The ratio of boys and girls =3:5

Let

Number of boys=3x

Number of girls =5x

  • According to the question Numbers of girls=130

[tex]{:}\longrightarrow[/tex][tex]\sf 5x=130 [/tex]

  • Now interchange both sides and get x

[tex]{:}\longrightarrow[/tex][tex]\sf x={\dfrac {130}{5}}[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x=26 [/tex]

Now

The number of boys=3x

=3×26=78

[tex]\therefore[/tex]Number of boys is 78.

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