Jambmaths question:
|
Score |
4 |
7 |
8 |
11 |
13 |
8 |
|
Frequency |
3 |
5 |
2 |
7 |
2 |
1 |
The mean score is
Option A:
7.0
Option B:
8.7
Option C:
9.5
Option D:
11.0
Jamb Maths Solution:
$\begin{align} & \overline{x}=\frac{(4\times 3)+(7\times 5)+(8\times 2)+(11\times 7)+(13\times 2)+(8\times 1)}{3+5+2+7+2+1} \\ & \overline{x}=\frac{174}{20}=8.7 \\\end{align}$
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