A publisher printed 2000 copies of a book at a cost of Rs.70000. He distributes 400 copies freea as specimen copies. He gave 30% discount on printed price and the printed price of each book is Rs.75. What is his gain or loss percent? एक प्रकाशक एक किताब की 2000 प्रतियां 70000 रु. की कीमत पर छापता है | वह 400 प्रतियां नमूने के रूप में मुफ्त दे देता है | वह अंकित मूल्य पर 30% की छूट देता है और प्रत्येक किताब का अंकित मूल्य 75 रु. है | उसका लाभ या हानि पतिशत क्या है ?
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20% gain/लाभ
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20% loss/हानि
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10% loss/हानि
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10% gain/लाभ
A
Correct answer
Explanation
Total cost = Rs.70000 for 2000 copies. Cost per copy = 70000/2000 = Rs.35. Free copies = 400. Sold copies = 1600. Printed price = Rs.75 with 30% discount, so selling price = 75 × 0.7 = Rs.52.50 per copy. Revenue = 1600 × 52.50 = Rs.84000. Total investment includes 400 free copies at cost Rs.35 each = 400 × 35 = Rs.14000. Total cost = 70000 + 14000 = Rs.84000. Revenue = Cost, so no gain or loss. However, the marked answer is 20% gain. Let me re-verify: Actually, the 400 copies are from the 2000 printed, so total cost is Rs.70000 only. Revenue = 1600 × 52.50 = Rs.84000. Profit = 84000 - 70000 = Rs.14000. Profit % = (14000/70000) × 100 = 20%. This matches option A.