Answer:
71/17
Explanation:
So there's 17 students total unless I misscounted those tiny ahh dots
the miles walked by each are as follows;
2+2+3+3+4+4+5+5+5+6+6+6+6+7+7
=71
since you're looking for the average (AKA the 'mean') if the group, you gotta divide the total of all their collective miles (71) by the number of students (17)
so 71÷17
that can be written at 71/17
hope this helps & lmk if what I wrote's unclear fr