The no. Of boys and girls are 7:5. No. Of boys is 8 more than no. Of girls.find total children in class

Answer 1

Let x = the number of girls

Let x + 8 = the number of boys

7/5 = (x+8)/x

Cross multiply.

7x = 5(x + 8)

7x = 5x + 40

2x = 40

x = 20 girls

x + 8 = 20 + 8 = 28 boys

Total number of students = 20 + 28 = 48