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$$10,10,10,10,8,8,8,8,12,12,11,y$$
The twelve numbers shown represents the ages, in years, of the twelve houses on a certain city block. What is the median age, in years, of the twelve houses on the block?
______ years


Solution

The correct answer is $$10$$. The above $$12$$ figures represent the age of $$12$$ houses on a street, and ask for the median. The given series are arranged from large to small . $$12$$ digits and the middle $$2$$ digits are added by $$2$$ and the median. There is an unknown number $$y$$ in the series $$'y'$$, but we can reason that the value $$y$$ is $$10$$
$$\therefore \cfrac{10+10}{2} = 10$$  

Mathematics

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