Hello aspirant,

We cannot really pick subtopics from a particular topic as they will be interlinked. If you skip one concept you will not be able to understand the rest of them.

Listed below are a few resources for binomial theorem for you to learn easily. Please take a look. Additionally, practice as much as you can and watch YouTube videos for the same. They'll hardly be an hour or 30 minute videos for Binomial theorem.

https://learn.careers360.com/maths/binomial-theorem-and-its-simple-applications-chapter/

You can also access the maths mock test from here: edugorilla.com

For any additional information, please access the link below:

https://university.careers360.com/articles/bhu-uet-syllabus

I hope this helps!

For any further questions, please revert.

Thank you!