Colleges in Bangalore

If you target for a good NIT, then you have to score more than 95 percentile or less than 30,000 rank.

https://www.shiksha.com/university/jain-university-bangalore-424Just follow the link for details.

Average fee to pursue B.Com ranges from INR. 10,000- INR. 1 lac per year. A high number of jobs are available for B.Com graduates in industries such as Information Technology, Manufacturing, BPO, Telecommunications and Banking. Average salary offered to B.com graduates varies with the industry that hires them. It lies roughly between INR. 2 Lacs - INR. 5 Lacs Indian rupees per year.

Choose PCM stream in 10+2. There are different requirements of different colleges but the basic one is at least 60% marks but actually you must have 80% for getting admission in a good institution. I would suggest you IGA, Delhi which is one of the best in India. Duration of courses also vary from college to college.
All the best for your future.

In terms of study and placement, ABBS is really good. Further, you can pursue MBA too from Acharya Bangalore B-School. It is one of the highest named school.

Yes, Mount Carmel College in Bangalore offers BBA degree course in the following specializations:
Marketing Management
Human Resource Management
Financial Management.

https://www.shiksha.com/college/st-joseph-s-college-of-commerce-brigade-road-bangalore-3600
Kindly visit the link once.

https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
You can follow this.

If that rank is in open category rank list, you may get a seat but class 12 marks also play a key role for your admissions. You must get minimum of 65% in your group subjects to get a seat in good college. But 50% in groups is mandatory. Do take care of it.