SOLUTION: Harry earned a mean score in his quizzes of 8.0. He misplaced one quiz. His other quizzes had scores of 6.5, 7, 10, 8.5, and 9. Which quiz score did he misplace? 1)7.5 2)4.0 3)7.

Algebra ->  Average -> SOLUTION: Harry earned a mean score in his quizzes of 8.0. He misplaced one quiz. His other quizzes had scores of 6.5, 7, 10, 8.5, and 9. Which quiz score did he misplace? 1)7.5 2)4.0 3)7.      Log On


   



Question 295461: Harry earned a mean score in his quizzes of 8.0. He misplaced one quiz. His other quizzes had scores of 6.5, 7, 10, 8.5, and 9. Which quiz score did he misplace? 1)7.5 2)4.0 3)7.0 4)8.0
Found 2 solutions by richwmiller, alicealc:
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
6.5+7+10+8.5+9+x = 8*6
x=7

Answer by alicealc(293) About Me  (Show Source):
You can put this solution on YOUR website!
the missing score = x
%286.5+%2B+7+%2B+10+%2B+8.5+%2B+9+%2B+x%29%2F6+=+8
%2841+%2B+x%29%2F6+=+8
41+%2B+x+=+8%2A6
41 + x = 48
x = 48 - 41
x = 7 (the third answer)