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Arithmetic Mean and Range

The daily rai...

Question

The daily rainfall for each day of a week in a certain city is given in millimetres. Find the average rainfall during the week.
$9, 12, 11, 8, 20, 16, 18$

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Solution

Average = $\frac{s u m o f t e r m s}{n u m b e r s o f t e r m s} = \frac{9 + 12 + 11 + 8 + 20 + 16 + 18}{7} = \frac{94}{7} = 13.43 m m$

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