12. What is the mean of the following set of scores: 5, 7, 10, 12, 18, 20,...

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12. What is the mean of the following set of scores: 5, 7, 10, 12, 18, 20, 24, 22, 24, 25?

(a) 145

(b) 17.2

(c) 16.7

(d) 167

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