A shopkeeper buys some articles. He intends to sell the articles at 20% discount after increasing the marked price by 50%, but 40% of the articles are found defective due to which he sells these articles at 20% discount, keeping the marked price unchanged. What % profit or loss does he make?

Assume the cost price of all articles is 100 rupees and 60 percent are good while 40 percent are defective. For the 60 good articles, the marked price is 150 rupees and a 20 percent discount makes the selling price 120 rupees. For the 40 defective articles, the marked price is 100 rupees and with no markup, a 20 percent discount makes the selling price 80 rupees, generating 32 rupees. The total selling price is 120 + 32 = 152 rupees against the 100 rupee cost, resulting in a 4 percent profit.

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