A. 7
B. 9
C. 12
D. 8
Submitted by: KAMRAN ARSHED
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2 Comments
To find the arithmetic mean of a set of data, you add up all the values in the set and then divide by the total number of values.
In this case, the set of data is {3, 6, 9, 12, 15}, and there are five values in the set. So we add up all the values:
3 + 6 + 9 + 12 + 15 = 45
And then we divide by the total number of values:
45 / 5 = 9
Therefore, the arithmetic means of the data set {3, 6, 9, 12, 15} is 9.
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