Mathematics Test—Calculator

So the mean of the list of numbers is the sum of the numbers (repeats included) divided by 12. That is the fraction whose numerator is 0 plus 1 plus 2 plus 3 open parenthesis, 3, close parenthesis, plus 2 open parenthesis, 4, close parenthesis, plus 6, plus 7, plus 8, plus … ................
................