Maths Spl

Let me start by telling you a little on what Economics is all about and how is it linked with Math and Statistics.
Economics is a social science. What makes it different is its use of maths and statistics to prove theories and concepts while still incorporating other subjects, such as politics, philosophy and geography. It is basically a statistical data which needs computing to get results.
Thus to study Economics at the Undergraduate level math is compulsory.

Yes, of course, you can go for B.Tech in agriculture after 10+2 with Physics, Chemistry, Biology and/or Mathematics as subjects. Combination of subjects may vary depending on the university.

Good morning dear,
Yes, of course.
A NBA course doesn't necessarily require candidates to have learned mathematics.
Admission details, fee structure & eligibility criteria is in the below link.
https://www.shiksha.com/bba/course/bba-hons-department-of-management-j-d-birla-institute-moira-street-kolkata-283534
Thanks and all the best.

You can give KMAT exam and get admission there.

You will have to fill the form and then check the cut-off list. Official site is www.kuk.ac.in.

Dear Audrin!
It's all depends upon where your interest lies within. After Commerce (+Maths) you will have the wide range of options available like, Finance or Economics Hons etc. CA CS CFA etc. So choose the best fit for you. Hope this helps.
Good Luck.