Respuesta :

rimalmina244

Answer:

Let the total no of girls be x

the number of boys=7:5

total no of students =20

now,

no of girls =7/5=x/20

or, 20*7=5x

or 140=5x

or,x=140/5=28

therefore the number of girls =28
5x4=20 boys
So that means
7x4=28 girls