Question

011. A shopkeeper earns a profit of Re 1 by selling one pen and incurs a loss of 40 paise per
pencil while settling of her old stock.
c) In a particular month she incurs a loss of Re 5. In this period, she sold 45 pens. How
many pencils did she sell in this period?
(ii) In the next month she
earns neither profit nor loss. If she sold 70 pens, how many
pencils did she sell?

Class 7 ch integers
Pls give step by step explanation​

Answer 1

Step-by-step explanation:

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.

Answer 2

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