A manufacturer makes a profit of 15% by selling a colour T.V. for Rs. 5,750. If the cost of manufacturing increases by 30 per cent and its selling price is increased by 20 per cent, find the profit per cent made by the manufacturer.
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Q3
Find the profit per cent or loss per cent made in the following case, when by selling 20 identical articles, a shopkeeper gains equal to S.P. of 5 articles.