SOLUTION: the scores for eight students were 16, 17, 18, 20, 22, 23, 25, and 25. If the mean of the scores for the nine students was 21, then what was the missing score?

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Question 902012: the scores for eight students were 16, 17, 18, 20, 22, 23, 25, and 25.
If the mean of the scores for the nine students was 21, then what was the missing score?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
From the definition of the mean,
%2816%2B17%2B18%2B20%2B22%2B23%2B25%2B25%2BX%29%2F9=21
16%2B17%2B18%2B20%2B22%2B23%2B25%2B25%2BX=189
Solve for X, that's the missing score.