30 kg of rice costing ₹50 per kg is mixed with 20 kg of rice costing ₹60 per kg. What is the average cost of the mixture per kg?

₹54

Total cost of 30kg of rice = 50 × 30 = 1500

Total cost of 20kg of rice = 60 × 20 = 1200

Average cost of the rice = \(\frac{Total \; cost}{Total \; quantity}\)

Average cost of the rice = \(\frac{1500 + 1200}{30 + 20}\) = ₹54