Question

By selling an article for 50 a shopkeeper gains 10. His gain percent is​

Answer 1

LET THE COST PRICE OF ONE ARTICLE = X

LET THE PROFIT PER ARTICLE — — — = Y

GAIN ON SELLING 25 ARTICLES — — — = 25Y = 5X (i.e) X = 5Y

THEREFORE PROFIT PERENTAGE = Y/X = Y/5Y = 0.2 (i.e) 20%

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