Question:
The following are the number of books issued in a school library during a week:
105, 216, 322, 167, 273, 405 and 346.
Find the average number of books issued per day.
Solution:
Numbers of books issued in the school library: 105, 216, 322, 167, 273, 405 and 346
Thus, we have:
Mean $=\frac{\text { Sum of observa tions }}{\text { Number of observations }}$
$=\frac{105+216+322+167+273+405+346}{7}$
$=\frac{346}{7}$
$=262$
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