Mathematical Reasoning第 39 / 120 题
What is the mean (average) of 4, 8, 10, and 14?
a.8
b.10
c.9
d.36
解析
Add the numbers to get 36, then divide by the count of 4, giving 9. The mean is the sum of values divided by how many values there are. The total, 36, is not the average itself.
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