First of all "do not fear probability questions", I think if you put in some efforts they are very easy to crack. Just do some practice, get basics clear & you should be happily facing probability!
Agree with vivek. Most probability questions can be solved if the number of possibilities are determined by permutations/combinations or brute force counting method.
I am not sure if ETS (well now UVE!) expects us to solve some complex probability probs in <2 min.
"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."
- Bernard Edmonds