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Q: What is the arithmetic mean for 9 plus 11?

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The average or mean of 3, 5, 7, 9, and 11 is 7.

The arithmetic mean of 10, 11, and 6 is 9. Add them together then divide by 3.

The answer depends on what you mean by 11 in(n) a half - which is not an expression that is recognised.

5 +9 = 9 + 5 is an example of arithmetic commutativity

The mean average is (7 plus 11) divided by 2 = 9

Median of the set = arithmetic mean of 8 and 9 = 8.5

-9

9 + 22 + 11 = 42

(-9) + (-11-4) + (-11-63) =-9 - 11 - 4 - 11 - 63 = -98

10+11+9+3= 33

11 + 7 + 9 = 27

To find the mean you add them all up then divide by the number of numbers so: 1+3+5+7+9+11 divided by 6 = 36/6 = 6

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