Question

Ratio of a boys and girls is a5:7.if the total students are 48,find number of and boys

Answer 1

ratio of boys and girls =5:7
let common ratio be x
so boys =5x girls =7x
total students = girls + boys
48=7x+5x
48=12x
4=x
so boys = 5x=5×4=20 boys

Answer 2

Solutions :-

Let the number of boys and girls be 5x and 7x respectively.

Total number of students = 48


According to the question,

=> 5x + 7x = 48
=> 12x = 48
=> x = 48/12 = 4


Therefore,
Number of boys = 5x = 5 × 4 = 20
Number of girls = 7x = 7 × 4 = 28