Question

in class of 40 students the number of girls is three-fifths of the number of boys.find the number of boys in the class.

Answer 1

Let the number of boys be x
Then the no. of girls = 3/5x
x + 3/5x = 40
5x+3x = 40*5
8x = 200
x = 200/8
x = 25

Answer 2

Let the number of boys = x
Number of girls = $\frac{3}{5} x$
x + [tex] \frac{3}5} x = 40 [/tex]

5x+3x = 40*5

8x = 200

x = $\frac{200}{8}$

x = $\frac{100}{4}$

x = 25

Number of boys in the class is 25.