If the selling price of one HB-Pencil is ₹5 and that of one 6B-Pencil is ₹8,…

Concept

When two quantities are given in the ratio a:b and the first quantity is known, the second quantity equals the first quantity multiplied by b/a. Total revenue is the sum of (quantity sold × unit price) for every product.

Application

1. For store C, the table gives 400 HB pencils and the ratio HB:6B = 4:1.

2. Number of 6B pencils = 400 × (1/4) = 100.

3. Revenue from HB pencils = 400 × ₹5 = ₹2,000.

4. Revenue from 6B pencils = 100 × ₹8 = ₹800.

5. Total revenue = ₹2,000 + ₹800 = ₹2,800.

Cross-check

The calculated quantities satisfy 400:100 = 4:1, exactly matching the table.

Result

Therefore, the total revenue generated by store C is ₹2,800.