Question

The ratio of boys and girls in a class is 5:3 if 20 % of the boys and 60 % of girls have passed in first class what percentage of the class is in first class?

Answer 1

let the number of boys be 5x and the number of girls be 3x
total students = 8x

students in 1st class = .2(5x) + .6(3)
= 2.8x

percentage in 1st class
= 2.8x/(8x)
= 28/80
= .35 or 35%