A marks her goods 25% above the cost price. She sells 25% of the goods at the marked price, 60% at 25% discount and the remaining at 10% discount. What is her overall gain or loss per cent?

Gain 4.375%

Let the cost price of the article = 100

Markup = 25%

Then the marked price of the article = 125% of 100 = 125

                    CP                  SP

25%            31.25             31.25 (sold at marked price)

60%            75                  56.25 ( sold at 25% discount)

15%           18.75              16.875 ( sold at 10% discount)

             ————————————————

                 125                104.375

Profit = 104.375 - 100 = 4.375

Profit% = 4.375 × \(\frac{100}{100}\) = 4.375%