Hi all,
I make this spreadsheet for estimating the probability of passing for level II. I don’t know if it useful for people level III but I think you can get interesting information from it.
https://www.analystforum.com/forums/cfa-forums/cfa-level-ii-forum/91360008
if you want, I think make a version for level III and level I tomorrow 
, but I need more specific information concerning the format of the exam.
Goodnight