Step-by-step explanation:
Let,
The number of boys be = x
So,
Number of the girls = 3 × x
= 3x
Therefore,
Ratio of number of girls to number of boys in school will be,
[tex] = \frac{number \: of \: girls \: in \: school}{number \: of \: boys \: in \: school} [/tex]
[tex] = \frac{3x}{x} [/tex]
[tex] = \frac{3}{1} [/tex]
= 3:1 (Ans)