The price of a refrigerator including $18\%$ GST is Rs. $23{,}600$. The price before GST is

The price of a refrigerator including $18\%$ GST is Rs. $23{,}600$. The price before GST is
  1. Rs. $19{,}500$
  2. Rs. $20{,}000$
  3. Rs. $21{,}000$
  4. Rs. $22{,}000$

Solution

Pre-tax price $= \dfrac{23600 \times 100}{118} = \dfrac{23600}{1.18} = 20000$.

Asked in: IMO

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