by selling 45 oranges for rs. 80. a man loses 20%. how many should he sell for rs. 48, so as to gain 20% in the transaction?

• 18
  
  If at Rs. 80 loss is 20% , then in order not to loose any money, man should sell 45 oranges for Rs. 100.
  So for the gain of 20% i.e. for Rs. 120 he should sell 45 oranges.
  Hence for Rs. 48 , he should sell 48*45/120 =18 oranges.
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