Profit Loss

Step 1: Understanding the problem.
Let the cost price of each article be . The total cost price of 76 articles is . The total profit is given as Rs 6570. We need to find the value of .
Step 2: Calculating the profit from each group of articles.
- Profit from 20 articles sold at 15% profit: - Profit from 40 articles sold at 19% profit: - Profit from 16 articles sold at 25% profit: Now, the total profit is the sum of the profits from all three groups, which is given as Rs 6570. After solving, we find that .
Step 3: Conclusion.
The correct answer is (C) Rs 420, as this is the cost price of each article.