A shopkeeper sells goods worth ₹x at y% discount. Find the value at which the goods are being sold. Determine this value, if the good is worth ₹100 beings sold at 20% discount.
A
₹60
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B
₹70
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C
₹80
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D
₹90
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Solution
The correct option is C ₹80 Letthepriceofthegoodbe₹xandthediscountisy%.Amountoff=y100×x=xy100Pricebeingsoldat=x−xy100Forx=100andy=20,Price=100−100×20100=100−20=₹80