15 kg rice costing ₹60 per kg and 8 kg rice costing ₹55 per kg are mixed with 7 kg rice costing ₹40 per kg. Find the average per kg price of mixed rice.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e ₹54.
Total cost
15 kg × ₹60 = ₹900
8 kg × ₹55 = ₹440
7 kg × ₹40 = ₹280
Total cost = 900 + 440 + 280 = ₹1620
Total weight = 15 + 8 + 7 = 30 kg
Average price per kg = Total cost ÷ Total weight = 1620 ÷ 30 = ₹54 per kg