The cost of $15$ pencils is Rs. $112.50$. How many pencils can be bought for Rs. $300$?

The cost of $15$ pencils is Rs. $112.50$. How many pencils can be bought for Rs. $300$?
  1. $32$
  2. $36$
  3. $40$
  4. $45$

Solution

Price per pencil $= \dfrac{112.50}{15} = 7.50$. Number $= \dfrac{300}{7.50} = 40$.

Asked in: IMO

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