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Question
Find the loss or gain as percent, if the C.P. of 8 articles, all of the same kind, is equal to S.P. of 10 articles.
Solution
C.P. of 8 articles = S.P. of 10 articles = ₹ 80 (suppose)
∴ C.P. of 1 article =`80/8` = ₹ 10
and S.P. of 1 article =`80/10 = ₹ 8`
∴ Loss = C.P. - S.P. = ₹ 10 - ₹ 8 = ₹ 2
Loss % = `("Loss" xx 100)/"C.P."`
`= (2 xx 100)/10 = 20%`
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