Maths Spl

Hi,
As you have completed your graduation in mathematics and psychology, you can go for Masters course in the same. Otherwise, there are various government jobs for which you can prepare like Indian railways, banking sectors, SSC CGL, etc.

Hi,
You can go for Masters in mathematics course (M.A.) after your BA in mathematics. You can also apply for various government jobs like Indian railways, banking sectors, SSC CGL, etc.

After your 12th, you can take admission for science and then you can do BCA or else you can take admission for commerce and after that, you can take admission for B.Com.
If you are weak in studies and do not want maths subject then you can take admission for arts and do BA with some special subject like psychology.

Hi,
Yes, you will be eligible to take admission in B.Com after completing the current course only. You cannot pursue two degrees at the same time. So, complete the current course and then go for B.Com.

Hi,
Yes, Dayalbagh University Agra provides mathematics honours courses. You can apply for this course, if you are interested. The admission will be done on the basis of your marks.

Admission will depend on cutoff released by the college.
Your marks in maths will play an important role in determining your admission in college.
Your category will also determine your admission

I fear that you get any good IITs in NITs too choice of stream will not be that much available. If you have interest in CSE & ECE you can go for IIITs and escalate your career there.

Yes, of course, you can apply for B.Sc Chemistry in Jadavpur University.