Question

At a school number of boy:number of girls is in the ratio 11:9

there are 124 more boys than girls
work out the total number of sutdents at the school

Answer 1

1240 (I'm not so sure but per my calculation that is what i got)

Explanation:

Boy : Girl

11 : 9

124 + x : x

11/9 = 124 + x / x

9(124 + x) = 11 x

1116 + 9x = 11x

1116 = 11x - 9x

1116 = 2x

x = 558

Thus, there are 558 girls in the school

Number of boys = 124 + x

= 124 + 558

= 682

Therefore, total number of students = 558 + 682 = 1240 students