Question

help me for this question please give with solutions don't write answers only please​

Answer 1

Answer:

20

Explanation:

A.M.=sum of all observations/number of observations

A.M.=

(12+18+15+27+19+26+30+13+18+22)/10

=200/10

=20

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Answer 2

Answer:

A.M = Sum of all observations / total number of observation.

$arithmetic \: mean = \frac{12 + 18 + 15 + 27 + 19 + 26 + 30 + 13 + 18 + 22}{10} = \frac{200}{10} = 20$

arithmetic mean = 20

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