Example:
8, 8, 7, 4, 5 = 6.66 a5.
But there is two 8s solves at the start, so you can roll them out, by doing 2 more solves, so the new a5 won't have those 8s solves. If you lucky, you might get two 6s solves.
Now the average goes 7, 4, 5, 6, 6 = 5.66 a5. (you could now attempt to roll the 7)