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average of 10, 20, 30

Average of 3 numbers
20
sum 60 ÷ 3
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average of 10, 20, 30 is 20 (sum 60 ÷ 3).

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sum of 10, 20, 30, 40 = 100average of 5, 10, 15, 20, 25 = 15median of 5, 10, 15, 20 = 12.5sum of 1 to 10 = 55average of 4, 8, 15, 16 = 10.75mean of 2, 4, 6, 8 = 5