Question

A shopkeeper earns a profit of Rs. 2 by selling one pen and incurs a loss of 1 Rupee per pencil while selling pencils of her old stock. In a particular day she incurs a profit of Rs.165. On that day, she sold 105 pens. How many pencils did she sell on that day?
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Answer 1

Step-by-step explanation:

total profit of 105 pen equal to Rs210

totally profit after selling pencils also=210-165=45

so he sold 45 pencils