I passed my class 12th in commerce without maths. Can I do CA along with BBA?

If you want to do CA along with BBA then you have prepare yourself for the CPT exam first and then you will go to the IPCC Level by clearing CPT but if you want to enter after BBA then you can directly get admission to the CA IPCC course.

According to me, go for BAF and CA because BBA and CA are totally different from each other, hence you would not be able to focus properly and CA needs full time study and the subjects of BAF and CA goes parallel to each other.

Both CA and BBA do not require maths as eligibility so you can do both. Just a word of caution. Take a look at course structure of both and start accordingly.