Question

ladke aur ladkiyo k ek group me15 ladkiyo k chale jane k uprant ladko ki sankhya ka ladkiyo ki sankhya ka anupaat 2:1 ho jata h bad me jab 45 ladke group se chale jate h to anupaat 1:5 ho jata h to start me ladkiyo ko sankhya kitne thi​

Answer 1

Step-by-step explanation:

Let the total no. of boys be 2X

the total no. of girls ne X + 15

When 15 girls leave the group no. of girls = X

Afterwards When 45 boys leave the group, the ratio becomes 1:5.

ACCORDING TO QUESTION

2X - 45 /X = 1:5

5(2X - 45) = X

10X - 225 = X

10X - X = 225

9X = 225

X = 225/9

X = 25.

TOTAL NO. OF GIRLS IN GROUP = 25 + 15 = 40