Question

consider a school which has 150 girls and 120 boys find the following ratios : girls : boys , girls : students

Answer 1

Ratios can be written in 3 ways. 

1. a to b

2. a:b

3. a
   -----
    b
Now for ur question we will do it in the order of the question.

girls to boys

There are 150 girls and 120 boys. So we would write this like:-

150 to 120

150:120

 150
--------
 120

Girls to students:- 

There are 150 girls, and in total there are ______ students.

Lets find the amount of students.

150 + 120 = 270

So, 150 girls and 270 students.

150 to 270

150:270

 150 
--------
 270

So, The ratios are ;-

Girls to boys:- 150:120

Girls to students:- 150:270

Hope I helped ya!! 

Answer 2

150/120 (girls to boys)

150/270 (girls to students)

those would be your ratios...hope you find it helpful :)