In how many ways can 9 examination papers arranged so the best and the worst papers are never together?

Explanation

To solve the problem of arranging 9 examination papers such that the best and worst papers are never together, we can follow these steps:

### Step-by-Step Solution:

1. **Calculate the Total Arrangements**:
The total number of ways to arrange 9 papers is given by the factorial of 9.
\[
\text{Total arrangements} = 9!
...