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100 पेसिल को बेचने पर एक दुकानदार को 20 पेसिल कै वि . मू . कै बराव्रर लाभ होता है, तो प्रतिशत लाभ ज्ञात करेंA. 25B. 20C. 15D. 12 |
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Answer» Correct Answer - A (a) Let SP of 1 Pencil is Rs. 1 SP of 100 pencil is Rs. 100 CP of 1 pencil is Rs. x CP of 100 pencil is Rs. 100x According to question, Gain =SP -CP 20=100-100x 100x=80 `x=(80)/(100)=(4)/(5),x=(4)/(5)` CP of 1 pencil = Rs. `(4)/(5)` CP of 100 penci = Rs. `(4)/(5)xx100`=Rs. 80 SP of 100 pencils = Rs. 100 `:.` gain % `=(20)/(80)xx100=25%` |
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