Answer:

Step-by-step explanation:
Given


Required
Determine the number of ways to fill the vacant position
The first position can be any of the 12 candidates;
The next candidate can be any of the remaining 11
The next candidate can be any of the remaining 10
The next candidate can be any of the remaining 9
The next candidate can be any of the remaining 8
The next candidate can be any of the remaining 7
So: we have;

