Question

In a class of 42 students, no of boys is 2/5 of the girls. Find the number of boys and girls

Answer 1

Answer:

12 boys, 30 girls

Step-by-step explanation:

Let g = girls & b= boys

Then,

g+(g/5) = 42

7g/5= 42

g = 6*5 = 30

b = 42 - 30 = 12

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Answer 2

Step-by-step explanation:

let the no. of girls be X

no. of boys = 2/5 of girls

= 2/5 of X

=2x/5

Total students are 42

2x/5+X=42

7x/5=42

X=42*5/7

X=30

2/5 of X=2/5 of 30

=12