एक व्यक्ति 10₹में 12की दर से कलम खरीदता है! तथा इन्हे 12₹ मे 10 की दर से बेच देता है लाभ प्रतिशत ज्ञात कीजिए
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hey dear
so sorry I didn't understand hindi that much but if you question in English language I will definitely answer you
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