IBPS Clerk Prelims Model Paper 7

Let the present age of A=x and B=y years
According to first condition

x−7

y−7

=

3

4

⇒ 4x - 28 = 3y - 21
⇒ 4x - 3y = 7 ... (i)
According to second condition

x+9

y+9

=

7

8

⇒ 8x + 72 = 7y + 63
⇒ 7y-8x=9........(ii)
Solving (i) and (ii), we get
x = 19 years, y = 23 years