For BBA and BA(MCJ) you will only have a entrance test which will have 60% weightage for Entrance and 40% for 10+2 results. There are no minimum marks mentioned in the official website. Apart from this course you will have admission entirely based on the merit list.

This information is from the official website of St. Xaviers Mumbai. You can follow the link below for the official website:

https://xaviers.edu/main/index.php/admissions-and-courses

I hope this answer helps. All the very best for your future endeavors!