The average cost of 4 items in a shopping list is Rs. 1,250. If one more item whose cost is Rs 2,000 is added to the list what will be the new average (in Rs.)?
Total cost of 4 items = 4 × 1250 = Rs. 5000
Total cost of 5 items = 5000 + 2000 = Rs. 7000
∴ New average = 7000/5 = Rs. 1400