BBA

After BBA, you can pursue Master's degree in the field of your interest. After that, you will have an opportunity to get a good job in any company. It will be very beneficial for your future as well. There are so many fields in MBA like finance, banking, marketing and many more.
All the best.

Sorry, to say dear, but doing BBA with these academics is not recommended. What you will do with these marks in future. I would suggest you retake class 12th exams and score good marks and then do BBA. Some low-class colleges will give you admission for money but that will not help you.

Boards marks have nothing to do with VIT admission but one should have 60% marks in physics, chemistry and maths. You will get admission in VIT University by writing VITEEE exam only otherwise it's not possible.

Good evening dear,
The fee for BBA starts from INR 50,000 to INR 6,00,000 for the complete course. It depends on which college you are studying in.
Thanks and all the best.

Good afternoon dear, For both the courses that you are interested to opt in for your career B.Sc. In economics would be the better option, as it would be beneficial in future as Statistics plays a major role in engineering . Thanks and All the best.

Good afternoon dear,
B.Com (Hons) anytime. No doubts about that. B.Com (Hons) has the syllabus taught to BBA student as well.
Thanks and all the best.

Top BBA Colleges in India are mentioned at the link provided below. This ranking is based on college rankings published by India Today. https://www.shiksha.com/bba/ranking/top-bba-colleges-in-india/93-2-0-0-0.