Question

A shopkeeper earns a profit of Rs.1 by selling a pencil and a loss of 20 paisa by selling an eraser. (1) In a given day he had a loss of Rs.10 on this day, he sold 35 pencil. How many eraser were sold on this day. (2) Next day, he earn a profit of Rs.25 on this day he sold 100 erasers . How many pencils did he sell.​

Answer 1

Answer:

profit earned by A shopkeeper by selling a pencil = rs 1

loss of the shopkeeper by selling an eraser = 20 paise

1) in a given day total loss earned = 10 rs

loss by selling an eraser= 20 paise

As rs 1=100 paise

so rs 10= 1000 paise

So eraser sold = 1000/20=50 erasers

2) loss earned by selling of eraser= 20 paise

that day he sold 100 erasers

so loss = 20x100=2000 paise

or rs 20

according to question , he earned a profit of rupees 25

as already on loss of 25 so in order to gain a profit of 25 rupees he had to gain a profit of rupees 45

as we know that profit on by the shopkeeper by selling a pencil = 1 rupees

so he had to sell 45 pencils

therefore that day he sold 45 pencils