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

i think

Explanation:

Let the ratio of number of boys to the number of girls be x:y

So, x : y = 11 : 9

Cross multiplying the above equation, we get

(Equation 1)

Now, there are 124 more boys than the girls.

So, x= 124+y (Equation 2)

Substituting the value of x from equation 2 in equation 1, we get

y = 558

The number of girls are 558.

Since, the number of boys are 124 more than the number of girls.

So, Number of boys (x) = 558 + 124 = 682

Total number of students = Number of girls + Number of boys

= 558 + 682

= 1240 students.

There are total 1240 students in a school.