Tilak's salary increases by 15% in the first year, decreases by 20% in the second year and increases by 25% in the third year. If Tilak's salary after these three years is Rs. 23,000, then find the salary of Tilak in the beginning of these 3 years.
1
Rs. 20,000
2
Rs. 18,000
3
Rs. 15,000
4
Rs. 25,000