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2014-09-08T21:48:40+05:30

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Let John buy the article at a cost C.

Peter buys it at (100+20)C/100 = 1.2 C

Peter sells to Mohan at = [ (100-5) /100 ]  * 1.2 C = 0.95 * 1.2 C = 1.14 C

Mohan buys it for 1.14 C = Rs 912

C = Rs 912 / 1.14 = Rs 800

John paid Rs 800 for the article.

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