Question

In a class of 35 students, the number of girls is two-fifth of the number of boys. Find the number of girls in the class.

Answer 1

Answer:

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Step-by-step explanation:

let the no. of boys be x

the no. of girls=2/5x

x+2/5x=35

(5x+2x)÷5=35

7x=5

x=5/7

Answer 2

Answer:

Let the no of boys be x

And let the girls be 2x/5

According to the questions

x + 2x/5 = 35

Solving the equation

x + 2x/5 = 35

= taking lcm as 5

So 5x + 2x/5 = 35 [ whole by 5]

= 7x/5 = 35

So 7x = 35*5

So x = 35*5

- - - -

7 [ cutting 35 by 7 so remaining 5 at 35 place]

So x = 25

So boys = 25

Now girls = 2x/5

So 2*25

- - - -

5 [ cutting 25 by 5 remaining 5 at 25 place]

So girls = 2*5 =10

So girls = 10