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Salim buys an old refrigerator for ₹9,000, spends ₹1,000 on its repair and ₹500 on transport. He sells it for ₹11,550. His profit per cent is
A shopkeeper sold two phones for ₹9,900 each. On one he gained 10% and on the other he lost 10%. On the whole deal, he made a
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