absolutely agree with Admin. if u read the guideline for PMP exam, there are percentage distribution proportional to the width of scope of the process groups and knowledge area, % distribution as to the number of question from each process group/KA are varrying but this doesnt mean you have to focus on the KA or PG with higher % Q population, as this is only proportional to the width of scope of that KA/PG. Meaning, PMZilla Admin is very correct, you have to focus on all, however based on your assessment of your passing potentional which can be concluded from taking various PMP Exam simulation, it will help u manage your preparation.