Question

A shopkeeper earns a profit of ` 1 by selling one pen and incurs a loss of 40 paise per pencil while selling pencils of her old stock.
In the next month she earns neither profit nor loss. If she sold 70 pens, how many pencils did she sell?

Answer 1

THANKS FOR THE QUESTION !

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SHE EARNS 1 RS PER PEN....

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NO. OF PENS SHE SOLD :

70

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SO,

HE HAS GOT PROFIT OF 70 ON SELLING PENS.....

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SHE LOOSE 40 PAISE PER PENCIL ...

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THE PROFIT WAS NULL....

MEANS HER LOSS ON PENCILS :

70 RS

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70 RS :

70 * 100 PAISE

7,000

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NO. OF PENCILS :

PROFIT ON PENS / LOSS PER PENCIL

7,000 / 40

175

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ANSWER :

..........." SHE SOLD 175 PENCILS "............

Answer 2

Profit from 1 pen = Rs 1

Loss from one Pencil = Rs 0.40

Find the profit from the 70 pens:

Number of pen sold = 70

Profit made from the 70 pens = 70 x 1 = Rs 70

Find the number of pencils sold

Since he did not make any profit

⇒ His loss must be Rs 70

Loss from 1 pencil = $0.40

Number of pencil sold = 70 ÷ 0.40 = 175

Answer:He sold 175 pencils.