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NCS Advantage Practice Exam
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What is the mean of the numbers 10, 20, 30, 40?
20
30
35
25
Reveal Answer
Correct Answer:
25
Explanation:
The mean (average) is found by adding all the numbers and dividing by how many numbers there are. For 10, 20, 30, and 40, the total is 100, and there are 4 numbers. 100 ÷ 4 = 25, so the mean is 25. The other values wouldn’t be the average of all four numbers, since they would require a different total or a different count.
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