Question

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?

Answer 1

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

${:}\longrightarrow$$\sf 5x=130$

• Now interchange both sides and get x

${:}\longrightarrow$$\sf x={\dfrac {130}{5}}$

${:}\longrightarrow$$\sf x=26$

Now

The number of boys=3x

=3×26=78

$\therefore$Number of boys is 78.