The average daily expenditure of Mohan over 4 days is ₹120. If his expenditure on the first 3 days are ₹60, ₹150 and ₹140, respectively, then what is his expenditure on the 4^th day?

₹130

Total expenditure of 4 days = 4 × 120 = Rs480

Sum of expenditure of 3 days = 60 + 150 + 140 = Rs 350

Expenditure of 4th day = 480 - 350 = Rs 130