Hello Brian,
The short answer is: NO, no one (except for PMI) knows how many questions on the PMP exam will use the PMBOK® Guide 7th Edition as a reference. PMI likely knows that but won't disclose this information. All they say is:
"The exam is based on the PMP certification exam content outline (ECO), not the (PMBOK® Guide) or other reference books. A Guide to the Project Management Body of Knowledge (PMBOK® Guide) – 7th Edition will now be a reference to inform the development of the exam items. However, before any validated exam item is added to the exam, there is a very rigorous and thorough review and field test cycle. This process takes multiple months."
You can find the above statement on the PMI website:
www.pmi.org/certifications/project-manag...n/pmp-reference-list
To emphasize the PMI's statement: the PMP exam is NOT a test of the PMBOK Guide (either 6th, 7th, or any other edition). The exam is based on the Examination Content Outline (ECO). The PMBOK Guide is used as one of the reference books to support the questions. It is definitely a very important reference, but it's just one of many and is not the main source for question development.
You may find our approach to question development in this thread:
www.project-management-prepcast.com/kune...nd-our-pmp-simulator
You may also find the following videos helpful:
www.youtube.com/c/CorneliusFichtnerPrepCast/playlists
I hope this addresses your concern.
Regards,
Stan Po, MBA, PMP, PMI-ACP, CSM, CIPP
Product and Program Manager
OSP International LLC