# A man sold 20 articles for Rs.60 and gained 20%. How many articles did he buy for Rs.60?

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Selling price Rs60= buying price for 20 articles+ gain

we are told gain is 20% which means gain=(BP)X (20/100) = 0.2 BP

that shows selling price =60= BP + 0.2BP Which means 60=1.2 BP

from which we gets BP= Rs50.

He got 20 articles for Rs 50 or (20/50) article per each Rs.

So for Rs60 he will get (2/5) X 60 which is 24