Question

30 girls and boys have planned for a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

Answer 1

girls to boys ratio is 3:7
let the number of boy be x
A/q
30/x = 3/7
⇒x =(30×7)/3
      = 70
number of boys will be 70

Answer 2

21 boys are there. ne 9 girls