A person purchases 40 items at ₹10 each. He sells a part of them at 25% profit and the remaining at 10% loss. The net profit is 4% in this transaction. The number of items he sold at a loss, is:

24

A person purchases 40 items = Rs. 10 each.

He sells a part of them profit of = 25%

He sells remaining at loss of = 10%

Net profit earned by him = 4%

Using allegation,

25%       (-10%)

         4%

14       :      21

2          :     3

2 + 3 = 5

5 = 40

1 = \(\frac{40}{5}\) = 8

Number of items sells at 10% loss = 8 × 3 = 24