AWS Pro Exam Details

FAQ : here

No.Of Questions: 80 -100 (No hard numbers anywhere. See my post here)

Time for the exam: 170 mins.

Pass Percentage: N/A (I am keeping 75% as my pass percentage, because most of the exams pass percentage is around 65%, even for CSA exam it's 65%)

Practice exam # of questions/time: 40Q/90 mins (2.25 mins/Q)

I think the main exam may have 75 questions, this is because I know the total time limit is 170 mins, and the practice exam gives 2.25 mins per question. If you divide the total time to time per question, you come to the 75 question limit. I may be wrong but something to think about.