Question

A's salary is first increased by 25% and then decreased by 20%. The result is the same as B's salary increased by 20% and then reduced by 25%. Find the ratio of B's salary to that of A's?

विकल्प

• 4: 3

• 11: 10

• 10: 9

• 12: 11

Answer 1

10: 9

Explanation:

Let Salary of A be = x, Salary of B be = y

Net effect after changed in A's salary

`=25-20-(20xx25)/100=0`

Net effect after changes in B's salary

`=20-25-(25xx20)/100=20-30=-10`

i.e B's Salary 90% of y
ATQ

`"x"=90/100"y"`

`⇒"x"/"y"=9/10`

Required ratio = 10 : 9