Question

There are four more girls than boys in Ms. Raub's class of 28
students. What is the ratio of number of girls to the number of boys in her class?

Answer 1

number of girls be G
and number of boys be B
A/q
B +4 = G
and B +G = 28
⇒B +4 + B = 28
⇒2B = 24
⇒B = 12 
so G = 16
ratio = 16/12 = 4/3 = 4:3

Answer 2

total students = 28
let us assume no. of boys = x
then no. of girls = x + 4
total no. students is
x + x + 4 = 28
2x = 28 - 4
2x = 24
x = 12
no. of boys = 12
no. of girls = 16
ratio is 16:12 or 4:3