Thank you for the opportunity to help you with your question!
Dear your question is under-progress, it would be available to you as soon as it completes within next few minutes.
Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 2nd, 2015
We assume that the job vacancy is 1 of the 12, and there are
11 non-job vacancy.
We can choose for interview in 5 ways.
For each of those 5 ways to choose for the interview, we can arrange
the other 11 people in the 11 non-job vacancy in 11! ways.
Answer: 5×11! = 5×39916800 = 199584000 ways