Question 50

waecmaths question: 

The following are scores obtained by some students in a test

8              18           10           14           18           11           13           14           13           17           15           8              16           13

Find the mean score

Option A: 

10

Option B: 

9

Option C: 

8

Option D: 

7

waecmaths solution: 

$\begin{align}  & mean=\bar{x}=\frac{\left( 8+8+10+11+13+13+13+14+14+15+16+17+18+18 \right)}{14} \\ & mean=\bar{x}=\frac{185}{14}=13.214 \\\end{align}$

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