Question

In a class of 40 pupils the number of girls is three fifths of the number of boys. Find the number of boys in the class.

Answer 1

Let number of boys is 'x'
number of girls is '3x/5'
Total strength of the class is 40
so,
x+3x/5=40
5x+3x/5=40
8x/5=40
8x=40×5
x=200/8
x=25
Then,no. of boys in class =x=25
no. of girls in class=3x/5=25×3/5=15
【PrOoF】
x+3x/5=40(x=25)
25+25×3/5=40
25+15=40
40=40[PrOvEd]

Answer 2

Step-by-step explanation:

Thank you for asking the question!

There is a class with 40 pupils, three fifth are the girls. so the number of boys will be calculated as follows.

Suppose Total pupils= 40

              Number of girls= 3\5        

              Number of boys= ?

According to a equation:

               y + 3 y\5 = 40

                       8 y\5 = 40

                              = 40*5\8

                              = 25

Hence the total number of boys are 25.

Hope it helps.