Question

in a class of 35 and the number of girls in 2 / 5 times the number of boys find the number of boys in the class​

Answer 1

Answer:-

There are 21 boys in a class if a classroom contains 35 students, 2/5 of which are girls.

Explanation:-

Given:

Total students in a class = 35.

Number of girls = 2/5 of total students in a class

The remaining boys in the class = (1 - 2/5) = 3 / 5

So, we will calculate 3/5 of 35

No. of boys = (3/5) × 35

= 3 × 7 = 21

Therefore, there are 21 boys in the class.

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Answer 2

Answer:

25

Step-by-step explanation:

Let number of boys = x

Let number of girls = 2/5 of x = 2x/5

According to Question

x + 2x/5 = 35

( 5x + 2x ) / 5 = 35

7x / 5 = 35

x = ( 35 × 5 ) / 7

x = 25 ( Answer )