Colleges in Mumbai

Hello Adnan,
Please refer to this link to get more insights of the colleges and branhes:
https://www.shiksha.com/b-tech/resources/mhcet-college-predictor.
However, as per your rank, you will get top colleges under MHCET domain.

Saint Andrews Institute of Technology & Management
SHREE GURU GOBIND SINGH TRICENTENARY UNIVERSITY
Sandip University
Dev Bhoomi Group of Institutions(Dehradun)
Indian Institute of Technology Bombay
Datta Meghe College Of Engineering
DATTA MEGHE COLLEGE OF ENGINEERING
Saraswati College of Engineering
Sardar Patel College of Engineering
Rizvi College of Engineering

Yes, you've got decent chances.
All the best.

No, it won't as every company comes with the criteria of their own. So, it's not just the marks they are looking for. Score is just one of the many things.

Both the colleges are good. It's totally upon your finances and the kind of ROI you are looking for.

Yes, it is good. The average package is around 8.5-9 LPA. You can check the list of recruiters by downloading the brochure for the course.

You should go for PGDM Ebiz as this is a kind of programme which will give you an edge over others as a manager with technological knowledge is something that every company is looking for.

Look, it's totally up to you if you think you can prepare again and score good marks then its fine. If you think while doing a job you may not be able to do it then go for the admission as it will add value to knowledge and experience.