"By selling 90 ball pens for Rs 160 a person   loses 20%. How many ball pens should be sold
Channel: Doubtnut
Date: 2020-07-12

"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%?"