A shopkeeper carns a profit of Rs. 10 by selling a pen and incurs a loss of Rs. 5 by selling a refill
(a) In a particular month the shopkeeper incurs a loss of Rs. 50. In this period, the number of pens sold
was 10. Find the number of refills sold during this period.
(b) Find the number of pens sold in a month, when the number of refills sold were 20 and there was no
profit and no loss during that period.
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Answer:
a.10 refills sold (answer of ques a)
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