Question

Verified by Toppr

Then, the number of girls = 2x

$⇒$ 3x + 2x = 630

5x = 630

x = 126

So, the number of boys = 3x = 3 $×$ 126 = 378

And, number of girls = 2x = 2 $×$ 126 = 252

After admission of 90 new students

Total number of students = 630 + 90 = 720

Here, let take the number of boys to be 7x

And, the number of girls = 5x

$⇒$ 7x + 5x = 720

12x = 720

x = 720/12

x = 60

So, the number of boys = 7x = 7 $×$ 60 = 420

And, the number of girls = 5x = 5 $×$ 60 = 300

Therefore, the number of newly admitted boys = 420 – 378 = 42

0

0