Question
A man finds that the cost price of 4950 articles is same
as the selling price of 4500 articles. Find his profit/loss%?Solution
Cost price × 4950 = Selling Price × 4500 (Cost Price )/(Selling Price )=  4500/4950 (Cost Price )/(Selling Price )=  10/11 Let Cost price of an article be 10x, and the selling price of the article be 11x Then Profit = x Profit % = x/10x  ×100 = 10%.
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