A fruit seller sold big, medium and small sized apples for ₹15, ₹10 and ₹5 respectively. The total number of apples sold were in the ratio 3 : 2 : 5. Find the average cost of an apple.

₹8 ₹10 ₹9 ₹7

₹9

Total cost = 15 × 3 + 10 × 2 + 5 × 5 = Rs. 90 Total Quantity = 3 + 2 + 5 = 10 Average cost = \(\frac{Total \; cost}{Total \; quantity}\) Average cost = \(\frac{90}{10}\) = Rs.9