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When a discount of 10% is given on goods being sold at a profit of 20% the number of units sold double . The ratio of the previous profit to the present profit is ??

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Vishnu

Let the cist price be 100.

When a profit of 20% is taken , the selling price is 120.

Let n be the total goods sold. therefore total profit = 20n

When a discount of 10% is given , Selling price = 108.

total goods sold =2n

therefore total profit =2n*8 =16n

The ratio = 20:16=5:4.

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