A professor has recorded exam grades for 1010 students in his class, but one of the...
A professor has recorded exam grades for
1010
students in his class, but one of the grades is no longer readable. If the mean score on the exam was
8282
and the mean of the
99
readable scores is
8686,
what is the value of the unreadable score?
Homework Answers
Let 'x' denote the unreadable score.
According to the question,
Sum of all 10 scores = 
Also, Sum of 9 scores = 
So, x = Sum of all 10 scores - Sum of 9 scores = 820-774 = 46
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