A shopkeeper earns a profit of rupees one by selling one pen and incurs a loss of 50 paise per notebook for selling notebooks of old stock .In a particular month he suffers a loss of rupees 75. In this period he sold 50 pens. How many notebooks did he sell in this month? Next month he earned a profit of rupees 125 and sold 200 pens. How many notebooks did he sell in this month?
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when loss is rs 75 by selling 50 pens
then he sold 250 notebook
when profit is rs 125 by selling 200 pens
then he sold 150 notebook.......
then he sold 250 notebook
when profit is rs 125 by selling 200 pens
then he sold 150 notebook.......
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