CBSE

After completing your 12th, you can do BBA or BBM with special subject finance where you can study both business studies and finance too and if you want to do masters, then after completing your course, you can do MBA in finance also.

Hi, sorry but you're too late. Now you can get admission in B.Com next year in 2019.
Good Luck!

What type of course registration are you asking for?

Hi Ayushi,
Yes, you can apply for studying in Australia. You will have to clear standardized exams like GRE GMAT & SAT. A bunch of exams will also be conducted to check your proficiency in English like TOEFL, IELTS. You will have to clear the exams and provide with the documents that have been asked by the institution you want to join.

In order to score more marks, everything must be covered. If you think that it is okay with a few marks. You can just study the main topics in each chapter and skip some which aren't that important.

Yes, it's generally in today's generation, it seems to have a very negative impact whether in case of admission for higher studies or job perspective.
Just make sure your class 12th percentage must be above 75% or at least 70% since the criteria for jobs is that students who have less than 60 or 70% they are not allowed to sit for the job the interview (on-campus placement). If you are fulfilling the eligibility criteria then it means that you can get a job.

If you do well in the paper, you will score well. There is no doubt that hardwork always pays off well. So, study well and appear for the exam with full preparations. I am sure, you will score well. All the best.

CBSE would be helpful, as it is recognised world wide.

No, it is not possible. You have to appear for the exam again and that score that you get will help you to get admission.