Question

The ratio of girls and boys in a class is 1 : 3.   Set up an equation between the students of class and boys and then draw its graph and find the number of boys in a class of 40 students.
plz don't post irrelevant answers ☺ ​

Answer 1

Answer:

Let no. of girls be x and boys be 3x

Total no. of students= 40

x+3x=40

x=10

Therefore the no of boys= 3x= 30

Now, the equation

Let the no. of boys be x and girls be y

Therefore,

The equation= x+y=40

Answer 2

Answer:

given:-

Ratio of girls and boys=1:3

Total students in class=40

Let the number of girls and boys be= 1x and 3x respectively

1x+3x=40

4x=40

x=40/4

x=10

Hence the number of boys in the class would be=>

3x= 3×10 = 30