5
3 1 9 2 7

If Bessie eats the first two questions, then the remaining scores are 9, 2, and 7. Removing the minimum and averaging, we get a final grade of 8, which is the highest possible.

^这是样例，说是可以最大达到8

而最多可以去掉n-2=3个，那我去掉1 2 3，剩9 7，7为最小值，去掉。9的平均值就是9啊