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Arithmetic Mean and Range

Question

Find the mean of the data $10, 15, 17, 19, 20$ and $21$ .
$11$
$16$
$17$
$21$

A

21

B

11

C

16

D

17

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Solution

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Data observations are: $10, 15, 17, 19, 20 a n d 21$

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