Valde07mendes Valde07mendes

20-12-2017
Mathematics

contestada

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.

Respuesta :

lilyamj lilyamj

20-12-2017

ok, so 11:9
11-9 = 2
which means that 124= 2:1
124/2 = 62
so 62:0
now 11 x 62= 682
9 x 62= 558

so the ratio is 682:558
now 682 + 558 = 1,240
There are 1,240 total students in the school. 682 boys and 558 girls

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