Question

In a class of 40 students, the number of girls is one third the number of boys. Then the number of girls is ____

Answer 1

Step-by-step explanation:

Let the Number of Boys be x

and ". ". ". Girls ". 1/3x

So, A.T.Q.

=> x + 1/3x = 40

=>3x + x /3 = 40

=> 4x = 40 * 3

=> 4x = 120

=> x = 120/4

=> x = 3

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Answer 2

Answer:

10

Step-by-step explanation:

let the no. of boys be x

and the no. of girls is 1/3x

given total no. of students is 40

So,

x+x/3=40

(3x+x)/3=4x/3=40

So,

x=(40×3)/4

x=120/4

x=30

Then,x/3×30

So, x=10

Therefore the no. of girls is 10