Hello prabhat!

BMS which is bachelor in management studies is an emerging course which colleges like St Xavier's (Kolkata) and other colleges are offering , you can opt for that if you wish to pursue pure management.

Also as far as you are concerned with high salary package, doing CFA with your graduation and gaining 2-3 years if work experience after it and opting for MBA (finance) from a well known institution like IIM or narsee monjee Mumbai, can do wonders for your career.

However depending upon your potential in mathematics you can also go for actuaries.