Add them up and then divide by how many numbers there are . Example 2+4+6+8+10=30 (5 numbers).
(total) 30 divided by 5 (total numbers) = a mean of 6.
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You have to add all the numbers together then divide it by how many numbers there are
Mean is the average. To find the average, add up the group of numbers and divide by how many numbers there were.
mode is the number that occurs the most and to find the mean/average, add all numbers, then divid that number by the number of numbers there were in your group of numbers.
The outlier skews the mean towards it.
The "mean" of a group of numbers is their "average". It doesn't tell you what the numbers are, or even how many numbers there are.