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Answer: the mean is 20

Explanation: To find the mean, you add all the numbers of the data set. (21+17+21+25+23+13) = 120. Then when you have that answer, you divide it by how many numbers are in the data set (6 numbers). So then it would be 120 divided by 6 = 20.

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Answer:

28

Step-by-step explanation:

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