1.

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

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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