Question

At a school

Number of boys: number of girls = 11:9
There are 124 more boys than girls
Work out the total number of students at the school

Answer 1

Boys to girls
11 : 9

11x - 124 = 9x
-124 = -2x
x = 62

Check:
11*62 = 682
9*62 = 558
682 - 558 = 124 :)

682 + 558 = 1240 students

Answer 2

number of students=1240

Explanation:

BOYS TO GIRLS-11;9

boys=11\20

girls=9\20

11\20-9\20=2\20

2\20=124

20\20=20\20×124÷2\20=20\20×124×20\2=1240