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Minu purchases a pair of sunglasses at Rs. $1000$ and sells to Kanu at $20 \%$ profit. Then, Kanu sells it back to Minu at $20 \%$ loss. Finally, Minu sells the same pair of sunglasses to Tanu. If the total profit made by Minu from all her transactions is Rs.$500$, then the percentage of profit made by Minu when she sold the pair of sunglasses to Tanu is

  1. $26 \%$
  2. $35.42 \%$
  3. $52 \%$
  4. $31.25 \%$

     

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