Question 44

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waecmaths question: 

Calculate the mean deviation of 5, 3, 0, 7, 2, 1

Option A: 

0.0

Option B: 

2.0

Option C: 

2.5

Option D: 

3.0

waecmaths solution: 

$\begin{align}  & mean=\frac{5+3+0+7+2+1}{6}=\frac{18}{6}=3 \\ & mean\text{ }deviation=\frac{\left| 5-3 \right|+\left| 3-3 \right|+\left| 0-3 \right|+\left| 7-3 \right|+\left| 2-3 \right|+\left| 1-3 \right|}{6} \\ & mean\text{ }deviation=\frac{2+0+3+4+1+2}{6}=\frac{12}{6}=2 \\\end{align}$

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