Question 664314
Let's see if we can have one score be a 0 and still get an average of 76.
A 76 average across 13 students says the total score by all students was {{{76*13 = 988}}}
If one student got a 0, that says the other 12 students must have an average os {{{988/12 = 82.33333}}}
Now one student can't score an 83 1/3, but can 12 students average that score?
Sure, one way would be for 8 students to score 83 and 4 to score 84. 
So it is possible for one score to be 0.

Now let's see if one student could score 100.
If so, the the remaining 12 students would need to average {{{(988 - 100)/12 = 74}}}
So that says a score of 100 is possible too.

The range is 0 to 100 (assumes 100 is the maximum score possible)