The computer school enrolment shows that there are 5 girls in every 12 boys. If the school enrolment in one year is 5,200, how many girls and boys are there?

Answer 1

if there are 5x girls and 12x boys, then

17x = 5200

Hmmm. 17 does not divide 5200.

Now, if there were 5100 students, then x = 300.