Calculating New Average Including Additional Score

The average (mean) score of a class of students on a math test is calculated to be 82.5. This average includes the scores of all students except for one student who scored 100. If the total number of students in the class is 20, what is the average score of the class when this student's score is included?

Use the following steps to find the solution:

1. Calculate the total score of the class excluding the student who scored 100.
2. Add the score of the student who scored 100 to the total.
3. Divide the new total score by 20 to find the updated average.