Q3
A shopkeeper earns a profit of Rs 1 by a selling one pen and incurs a loss of 40 paisa per pencil, while selling.
1) In a particular month the incurs a loss of Rs. 45. in this period he sold 45 pens. How many pencils did he sell in this period.
2) In the next month he earns neither profit not loss. if he sold 70 pens, how many pencils did he sell.