Question

a shopkeeper earns a profit of rs10 on selling a pencil box and incurs a loss of rs 5 while selling an eraser,which are defective1) in a particular month he incurs a loss of ₹ 50 .in this period ,he sold 25 pencil box.how many eraser did he sell in this period ? 2) in the next month he earns neither profits mor loss .if he sold 50 pencil boxes ,how many eraser did he sell ( maths question in integer )​

Answer 1

Answer:

By selling a pen gain is Rs.2

and by selling a pencils, he loses 50 paise

and an eraser, he loses 15 paise

On one day, he gain =Rs.10

On that day he sold 10 pens and pencils and erasers in the ratio of 7:10

On ten pens, his gain =10×2=Rs.20

loss on pencils and erasers =Rs.20−Rs.10=Rs.10=1000 paise

Ratio in pencil and eraser =7:10

Let number of pencils =7x, then eraser =10x

7x×50+10x×15=1000

⇒350x+150x=1000

⇒500x=1000

⇒x=2

Numbe rof penciles =7×2=14

and number of erasers =10×2=20