In grade 9 The ratio of girl to boys is 4,5 if There are 20 boys How many boys are There
There are 25 girls in the grade. This is calculated by multiplying the ratio of girls to boys (4:5) by the number of boys (20):
4/5 = x/20
Cross multiply to solve for x:
5x = 4 * 20
5x = 80
x = 80/5
x = 16
So, there are 16 girls in the grade. Adding the 20 boys, the total number of students in the grade is:
20 boys + 16 girls = 36 students
Therefore, there are 20 boys in the grade.