Joseph mixes almonds costing ₹640 per kg and ₹800 per kg in the ratio $5 : 3$ and sells the mixture at ₹840 per kg. What is his profit percentage?

Explanation

1. 01

   Cost of 8 kg = $5 \times 640 + 3 \times 800 = 3200 + 2400 = 5600$ rupees, so ₹700 per kg.

2. 02

   Profit per kg = $840 - 700$ = ₹140.

3. 03

   Profit % = $\frac{140}{700} \times 100 = 20\%$.