Question

Ahmed got the following marks in a unit test.20,11,25,21,23and24.What is the arithmetic mean of his marks
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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

$mean \: = \frac{sum \: of \: all \: data}{number \: of \: data} \\ = \frac{20 + 11 + 25 + 21 + 23 + 24}{6} \\ \frac{124}{6} = 20.6$