A grocer mixes 6 kg of sugar at ₹38 per kg with 4 kg at ₹43 per kg and sells the mixture at ₹46 per kg. What is his profit per cent?

Explanation

1. 01

   Cost price of the mixture: $\frac{6 \times 38 + 4 \times 43}{10} = \frac{228 + 172}{10} = 40$ rupees per kg.

2. 02

   Profit is ₹6 on every ₹40, which is $\frac{6}{40} \times 100 = 15\%$.