BBA

Hello Cyriac,
60% is more than enough to get into a college for MBA. It's the eligibility criteria that a college asks you to fulfill for PG studies.
However, it may vary upon the institutes’ overall cut-off and percentile of that specific year.

Yes, you can go for BBA having Science, as a background because most of the universities considers English as a main subject for the eligibility criteria.

BBA in Aviation is a three year under graduate programme offered by REVA University.

You will need to contact the college directly for this information.

You can refer to this article https://www.shiksha.com/bba/articles/top-10-bba-colleges-in-india-blogId-7797.

DAVV Indore does not offer BBA for the list of other available courses, check out the link below:
https://www.shiksha.com/university/devi-ahilya-vishwavidyalaya-Indore-51562.

There will be an aptitude test followed by an interview.

Yes, sure you can apply in Stella Marris College. Before that, check your all facilities which you are willing for in the college to join.

No, it doesn't not offer BBA course.

The eligibility criteria for MBA (IB) from AMU is
Bachelor's degree in any discipline with at least 50% marks in aggregate.