Question

rajan earns a profit of rupee 1 by selling one pen and suffers a loss of 50 paisa by selling one pencil. one day he earns 20 rupees, if he sells 50 pens how many pencils did he sell ? the next day he earns neither profit nor loss, if he sells 40 pencils and how many pens did he sell ?

Answer 1

The total number of pens sold by him is 140.

Step-by-step explanation:

Given that,

Rajan earns a profit by selling 1 pen = Rs. 1

so, the profit earned on 50 pens = Rs. 50, which we denote by + Rs. 50

Total loss = Rs. 20, which can be denoted by Rs -20.(40/0.5paise)

Profit earned + Loss incurred = Total Loss

Therefore, loss incurred = Total Loss - Profit earned.

= Rs. (-20 -50)

= Rs. (-70)= -7000 paise

Loss incurred by selling one pencil = 50 paise, which we will write as -50 paise.

So, the number of pens sold = (−7000)÷(−50) = 140 pens.

Learn more: find the number of pencils

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