Question 28

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waecmaths question: 

Scores

0 – 4

5 – 9

10 – 14

Frequenct

2

1

2

The table shows the distribution of the scores of some students in a test. Calculate the mean score.

Option A: 

5.6

Option B: 

6.2

Option C: 

6.6

Option D: 

7.0

waecmaths solution: 

$\overline{x}=\frac{(2\times 2)+(7\times 1)+(12\times 2)}{5}=\frac{4+7+24}{5}=\frac{35}{5}=7$

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