The average expenditure of Raman for 5 days is Rs. 130. If his expenditure for the first 4 days is Rs. 100, Rs. 125, Rs. 85 and Rs. 160 respectively, then what is his expenditure (in Rs) of the 5th day?
Total expenditure of 5 days = 130 × 5 = 650
Total expenditure of first 4 days = 100 + 125 + 85 + 160 = 470
∴ Expenditure of 5th day = 650 – 470 = 180