Question 1171092
mean-total/n
80=total/5, so total must be at least 400
the total is 314 from the 4
that leaves 86 as the minimum score needed.
-
72 is -8 from 80
78 is -2
80 is the same
84 is +4
the sum of the differences is -6. So the next quiz needs to be +6 or 86.