Yes, I mean 2-nd. You say that no such questions. However, I've found one in a prep. book
Stick to the content of the OG. if its not in the OG , its not on the GMAT.
of course, you may get difficult probability or tough combinations, but still those are part of the OG content. We are expected to have reasonable expertise in the content that is included in the OG.
We have recently started classfying problems based on difficulty level and relevance to the GMAT. you can go over those if you are short of problems to practice.