a shopkeeper earns a profit of rupees 1 by selling one pen and incurs a loss of 40 paise per pencil while selling pencils of her old stock.
1- in a particular month she incurs a loss of rupees 25. in this period , she sold 45 pen. How many pencils did she sell in this period?
please give me step by step explanation. this question’s answer is 125
Answer:
Profit earned by selling 1 pen = Re 1
Profit earned by 45 pens = Rs. 45, which we denote by + Rs. 45
Total loss given = Rs. 5, which we denote by Rs -5.
Profit earned + Loss incurred = Total Loss
Therefore, loss incured = Total Loss – Profit earned.
= Rs. (-5-45)
=Rs. (-50)= -5000 paise
Loss incurred by selling one pencil = 40 paise, which we write as -40 paise.
So, number of pencils sold = (−5000)÷(−40)=125 pencils.