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By selling 90 ball pens for Rs. 160 a person loses 20%. How many ball pens should be sold for Rs. 96 so as to have a profit of 20%? |
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Answer» By selling 90 ball pens for Rs. 160 a person loses 20%. How many ball pens should be sold for Rs. 96 so as to have a profit of 20%? |
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