I remember there are three questions on responses to risk. The last question is "You are responsible for a project, There are no resources available for part of the work, so you decide to let a third party do the work." It might be "Avoidance". By letting a third party do the project, this risk is eliminated. For "Transfer", it means that the risk is transferred to another party without affecting the risk's impact and possibility.
For type of cost, there are two questions. The first is "What type of cost is project rental?". "Fixed cost" is not provided as an option, so I chose "indirect cost". The second is "Who is responsible for overhead cost/administrative cost in a project?" I chose "Executive management".
For these queations, I chose the same answers as you, avoidance, Indirect cost. My confusion is why it has two similar questions about risk avoidance in the test. Maybe, these two will not be involved in the score calculation, but just for evaluation purpose of PMI.
For the risk question, I don't think it's an avoidance. If you decide to let another party to do the work, it may mean a contract. So it should be a transfer case.
1. Headfirst PMP, this books is easy to be understood than PMBok and will let you learn concepts very well; 2. PMBok 2004, can't be ignored. Many questions are the exact words in the book. 3. Rita's PMP Exam Prep. Although there are seldom questions on the real exam are rita-like, it's still worth reading. Better if you have rita's FasTrack CD for mock test. 4. Other mock tests: PMStuday is good, similar to the real exam.