A Shopkeeper earns a profit of $2 by selling a pen and incurs a loss of 50 paise per pencil and loss of 15 paise per eraser while selling pencils and erasers of old stock. On the particular day, he earns a profit of $10. If he sold 10 pens and the number of pencils and erasers are in ratio 7:10, then find the number of erasers he sold on that day????
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earlier question was for pencils and now for erasers please answer quickly
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Step-by-step explanation:
The number of pencils = 7x
The number of erasers = 10x
Loss on pencils= 3.5x$
Loss on eraser= 1.5x $
Adding Total loss is 5x$
total profit from pens only is 20$
20$-5x$=10$
x=2
No of pencil= 14
No of erasers=20
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