Question

In a class of 42 students, the number of boys is 2/5 of the girls.Find the number of boys and girls in the class.

Answer 1

Answer:

The number of girls is 30 .

The number of boys is 12

Step-by-step explanation:

Let the number of girls be x

Since we are given that the number of boys is 2/5 of the girls

So, Number of boys = 2x/5

There are 42 students in total.

So, x+(2x/5)=42

7x/5=42

7x=210

x=30

Thus the number of girls is 30 .

Number of boys = 2x/5=(2*30)/5=60/6=12

Thus the number of boys = 12

Answer 2

Answer:

the no. of boys is 12

the no. of girls is 30

Step-by-step explanation:

Let the no. of girls be x

no. of boys = 2/5 of x

= 2x/5

total students = 42

so, x+2x/5=42

7x/5=42

7x=5×42

7x=210

x= 210/7

x=30 no. of girls

no. of boys = 2/5 of x

=2/5 x 30 = 12