Dear,

It is quite good that you have decided at an early stage as to which career you want to pursue. MBA needs a graduation i.e B.E/B.Tech or BBA or CA or any degree. You can take commerce or non medical subjects to pursue a successful career in management. Maths, would definitely be an add on. Another point to keep in mind is to see that your percentage of your classes remains good so that you can get a seat in a good institution like IIMS, SP Jain, FMS, SYMBIOSIS etc. so that you have a good job in hand after the completion of your course.

Hope this helps!