Question

the ratio of the number of boys to the number of boys to the number of girls in a class is 4:5 .If there are 20 boys in the class ,then the number of students in the class is ?​

Answer 1

Correct Question :

The ratio of the Number of boys to the Number of girls in a class is 4:5 . If there are 20 boys in the class , then the Number of Students in the class is ?

Given :

⬤ Ratio of Number of boys to Number of girls is 4:5 .

⬤ Total Number of boys are 20 .

To Find :

⬤ Total Number of Students in Class.

Solution :

Let :

• The Number of boys be = 4x
• The Number of girls be = 5x

So :

$\sf{4x=20}$

x = 20/4

x = 5

Therefore , The Value of x is 5 .

Now :

Number of Boys = 4x

= 4(5)

= 20

Number of Girls = 5x

= 5(5)

= 25

Total Students = 20 + 25

= 45

Hence , The Total number of students are 45 students .