3 kg of dal at ₹90 per kg is mixed with 2 kg at ₹120 per kg. What is the price per kg of the mixture?

Explanation

1. 01

   Total cost: $3 \times 90 + 2 \times 120 = 510$ rupees, for 5 kg.

2. 02

   Mean price $= \frac{510}{5} = 102$ rupees per kg.