Question

In a school, the ratio of boys to girls is 7:5. If there are 4800 students in the school, the how many girls are there in the school?.

Answer 1

$\frac{B}{G}=\frac{7}{5}$ $\left[\begin{array}{c}B\to No.ofBoys\\ G\to No.ofGirls\end{array}\right]$

Total no. of students$=4800$

$\Rightarrow B+G=4800$

$\frac{7G}{5}+G=4800$

$\frac{12G}{5}=4800$

$G=400\times 5=2000$

$\therefore$ No. of girls$=2000$.