I think you are right. You can find TUTOR everywhere. But there are a few good tutors. So, don't worry about the redundant since the bad tutor will disappear soon. $60 per? It must be a good tutor. Trust me!
I couldn't explain since I need more room and time. But as a good...
I think the answer is 30.
How many arrangements for total:
the answer should be: 5P5/2!=60, since there are two A's.
How many arrangements for two A's togather:
the answer should be: 4P4=24
How many arrangements for the first position is B and...