Science

Eligibility for M.Sc. in Anesthesia
As a minimum criterion of eligibility, aspiring candidates need to have completed graduation in Science (B.Sc.) stream from a recognized university with Physics, Chemistry and Biology as main subjects, and with a minimum aggregate score of 45%.
M.Sc. in Anesthesia: Admission Process
Admission process for the course may vary between institutes. A few top institutes also have an entrance test and round of personal interview in place for admission to the course. Students are selected based on the obtained merit. A few institutes also offer direct admission to the course.

Please refer to the link provided below for a detailed list of entrance exams conducted for M.Sc programs in India.
https://www.shiksha.com/science/articles/top-bsc-msc-entrance-exams-in-india-blogId-13484

You will get access to almost all the colleges with commerce and maths after class 12th for B.Com. Though many have their entrance exams. There is a course called business maths, check it out if it is available in your city's school. It is the best option for commerce students, but if you are unable to cope up with class 12th maths no need to add an extra burden. Option for BBA in many colleges will still be open. However, with business maths, you will be eligible for all colleges commerce courses and it will not be as tough as science mathematics.

Hi, You have to check with the college directly. Please visit the website and go through the eligibility. You can also check here for details:
https://www.shiksha.com/bba/course/bachelor-of-business-administration-madras-christian-college-tambaram-sanatorium-chennai-110316

Hi Sarang,
The admission process is online, the requirements are mentioned clearly on the program website. At least 55% to 65% in your Bachelor's degree is required. You must also take the IELTS (IELTS: 6 (min 5.5 in all areas) or you can take the BrunELT: 60% (min 55% in all areas). There is an application link on the website which you need to click and fill up your form and submit.

Mathematics will come to use in the entrance exam itself and post that if you choose to enter into finance field it will be of use somewhere or the other.
Avoid complete negligence of mathematics, at least try to have a basic knowledge of the important concepts which would come to use in future.