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Q:

A scientist mixes 10% water in his solution but he is not content with it so he again mixes 10% more water in the previous mixture. What is the profit percentage of the scientist if he sells it at cost price:

  • 1
    15%
  • 2
    21%
  • 3
    18%
  • 4
    16%
  • 5
    None of these
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Answer : 3. "18%"

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