Hello Sarita,

St. Xaviers, mumbai dosen't really require mathematics for persuing BMS course. So, you need not take stress about it if you are a commerce background student. To opt for an BMS course in St. Xavier's mumbai you have to register in the online for the entrance examination. The syllabus for the entrance examination is,

English comprehension skills.

Current Affairs.

Data Interpretation.

General Knowledge.

Logical and Visual reasoning.

Economics.

Creative Thinking.

These are the most important areas that you should concentrate on while preparing for the St. Xavier's Mumbai entrance examination as per the reviews of  many students since past few years.

Hope this Helps.

Good Luck! will be happy to help with any other doubts.