Oracle don't print a breakdown on the exam report like they used to so no-one can give you an official breakdown. I didn't pay too much attention the question breakdown but I would say the number of questions was pretty equal throughout the exam checklist, with the exception of RAC and Advanced Replication which got very few questions.

Someone out there may have paid more attention to the breakdown. If so they may be able to give you as rough idea.

Cheers