Avinash’s monthly salary is ₹50,000 and his monthly expenditure is ₹18,000. Radha’s monthly salary is ₹60,000 and her monthly expenditure is ₹24,000. Find the ratio of Radha’s savings to Avinash’s saving’s.

A

9 : 8

B

9 : 7

C

6 : 5

D

8 : 7