A dealer marks a TV $30\%$ above the cost price and gives a discount of $10\%$ on it. His profit percent is

A dealer marks a TV $30\%$ above the cost price and gives a discount of $10\%$ on it. His profit percent is
  1. $15\%$
  2. $17\%$
  3. $20\%$
  4. $23\%$

Solution

Let CP $= 100$. MP $= 130$. SP $= 130 \times 0.90 = 117$. Profit $= 17$, so profit\% $= 17\%$.

Asked in: IMO

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