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

no. of girls =X
no. of boys = 2/5x
2/5x + X =42
7/5x=42
X=42*5/7=30
girls =30
boys =12

Answer 2

Answer: No of girls = 30

No of boys= 12

Step-by-step explanation:

Number of girls in the class = x

Number of boys in the class= 2/5x

Equation :

2/5x + X = 42

2/5x + 5x/5 = 42. LCM

7/5x = 42

7x = 42*5

X = 210/7

X = 30

Hence,

Girls = 30

Boys = 12