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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The arithmetic mean of 10, 11, and 6 is 9. Add them together then divide by 3.
The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29
-1 deduct 3 each time
2+3+5+7+11 = 28/5 = 5.6
1/2 (3x + 1 + x - 3) = 1/2 (4x - 2) = 2x - 1