Amount of time needed to pass

On average how long did you guys study for the test. Im just looking for an average time frame just to get idea on how long it should take me. I understand that everyone has there own learning speed so of corse i will take that into account. Thank You
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Also dont be fooled by people that say you can pass the exam from watching videos from any source , you need some prior experience and allot of luck to do what . The main issue with this exam for someone green is that there is no ultimate study material , no source that will guarantee a pass if learned well . The main 2 books and not enough individually and you need to spring some practice , some technet and some videos to strenghten your learning. All this takes much more time then needed if just one good resources (book) was available .
Tbh i think those 3 exams will be my first and last MS certification. I cant stand that i have to study from 4 sources because not one is decent enough !
There is a Ref Exam pack with 410/411/412 coming out Feb 22nd on Amazon, I also purchased the 417 exam reference for my kindle by JC Makin, he has good reviews.
Hope this helps.