Question

there are 60 student in class. the girl conists of 1/3rd of number boys. find the number of boys and girls.

Answer 1

$60 = \frac{1}{3} x + y$

Answer 2

Let the no. of girls=x
no.of boys=y
total students =60
x+y=60
acc. to ques.
x=1/3y
subsituting value of x in total students
1/3y+y=60
(y+3y)=60×3
4y=180
y=45
x=60-45=15
hence no. of girls=15
no. of boys=45