After spending $65\%$ of his salary, Ramesh saves Rs. $7{,}000$. His monthly salary is

After spending $65\%$ of his salary, Ramesh saves Rs. $7{,}000$. His monthly salary is
  1. Rs. $18{,}000$
  2. Rs. $20{,}000$
  3. Rs. $22{,}000$
  4. Rs. $25{,}000$

Solution

He saves $35\%$ of salary. So $\dfrac{35}{100} \cdot S = 7000 \Rightarrow S = \dfrac{7000 \times 100}{35} = 20000$.

Asked in: IMO

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