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Question
A certain number of articles are bought at Rs. 450 per dozen and all of them are sold at a profit of 20%. Find the S.P. of:
(i) one article
(ii)seven articles.
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Solution
C.P. of 1 dozen articles = Rs. 450
Profit = 20%
∴ S.P. = `("C.P." xx (100 + "Profit"))/100`
= Rs. `(450 xx (100 + 20))/100`
= Rs. `(450 xx 120)/100` = Rs. 540
(i) ∴ S.P. of 1 article = Rs. `540/12` = Rs. 45
(ii) S.P. of 7 articles = Rs. 45 × 7 = Rs. 315
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