Question

A shopkeeper earns a profit of 5 by selling
a notebook and incurs a loss of 50 paise per
pencil and eraser while selling these from the
old stock. On a particular day, she earns a
profit of 30. If she sold 10 notebooks and
the number of pencils and erasers she sold are
in the ratio of 6:4, then find the number of
pencils and erasers she sold on that day.​

Answer 1

Answer:

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Step-by-step explanation:

A shopkeeper earns a profit of Rs 2 by selling a pen and incurs a loss of 50 paise per pencil and loss of 15 paise per eraser while selling old stock. On a particular day, he earns a profit of Rs 10. If he sold 10 pens and number of pencils and erasers he sold are in the ratio 7:10, then find the number of pencils and eraser he sold that day.

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

Answer 2

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