I'm studying for an onsite interview with Google for a product manager position. While looking at interview questions online, I've realized that I really need to brush up on the probability and statistics that I once knew well in college -- marbles, cards, dice, etc. I'm expecting questions like this one:
If the probability of observing a car in 30 minutes on a highway is 0.95, what is the probability of observing a car in 10 minutes (assuming constant default probability)?
What's a good way to find a lot of problems at this level? I'd like to try to do several per day between now and the interview (which is a couple weeks away). Are there any good books of problems like this? I don't think I need to study permutations/combinations or types of distributions or anything like that, so a general prob/stat textbook isn't really what I need. I don't really know how to characterize those problems well enough to search for them.