One-Fourth of goods is sold at a loss of 20% If there has to be an overall profit of 10%, at what gain percent remaining goods were sold?

Let total goods = 4 units with CP = 1 per unit (total CP = 4). 1 unit sold at 20% loss gives 0.8. To achieve 10% overall profit, total SP should be 4.4. Remaining 3 units must yield 4.4 - 0.8 = 3.6. So SP per unit for remaining goods = 3.6/3 = 1.2, which is a 20% gain. This uses the weighted average concept for mixed profit-loss scenarios.