# A shopkeeper earns a profit of re.1 by selling one pen and incurs a loss of 40 paise per pencil of her old stock. In a particular month she incurs a loss of rs.5 . In this period she sold 45 pens. How many pencils did she sell in this period?

Profit per pen = Rs 1

Loss per pencil = 40 paise = Rs 0.40

Assume she x pencil in the month.

Net loss = x(0.40) - 45(1)

5 = x(0.4) - 45

x = 50/.4 = 125

Hence she sold 125 pencils in this month.

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