Question

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?

Answer 1

Profit per pen = re.1
profit for 45 pens = rs.45
if profit is always in positive then loss for the month is -5
so 45+x = -5
x = -50
so the loss is -50
pencils sold = (50/0.40)
                  = 125