A trader gives 2 articles free with every 12 articles bought and still gains 20%. By what percentage above cost price are the articles marked?
Correct answer D. 40%
Explanation
He receives the marked price of 12 for 14 articles: 12 MP = 14 × 1.2 CP = 16.8 CP. So MP = 1.4 CP, that is 40% above cost.
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