A laptop is listed at Rs. $40{,}000$. After a $10\%$ discount, GST of $18\%$ is charged on the discounted…

A laptop is listed at Rs. $40{,}000$. After a $10\%$ discount, GST of $18\%$ is charged on the discounted price. The final amount is
  1. Rs. $42{,}000$
  2. Rs. $42{,}480$
  3. Rs. $43{,}200$
  4. Rs. $44{,}000$

Solution

Discounted price $= 40000 \times 0.90 = 36000$. GST $= 18\%$ of $36000 = 6480$. Total $= 36000 + 6480 = 42480$.

Asked in: IMO

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