What is the pass rate for 25B AIT course?

All military Academic Schools are designed to have you pass IF you actually read the syllabus AND read the pages it tells you to read, AND answer the sample questions. I learned that early and ended up at the top or near the top in all my classes. It helps if you can read fairly fast.
The Military is very good at reducing the subject to the stuff you need to do your job and teaching you how to use reference books, or programs now days.

In my class we had about a 60% fail rate (2009) with about 1/2 of all failures happening in the TCP/IP class, so a bit of focus on subnetting and practicing binary math will go a long way toward you being successful.

In fact, studying in AIT schools is easier than in regular colleges. When I was writing a paper with https://au.edubirdie.com/case-study-help I found info that AIT students have a huge successful graduate percentage. But as you know they are not designed for high academic achievements.

They're definitely not designed to be passed by everyone. A lot of the entry level AIT schools are designed that way, and all the schools are designed to provide sufficient instruction and practice. But there are plenty of schools in the Army with a greater than 50% attrition rate. Don't be over confident going into a school, pay close attention, and you'll be just fine.