In order to study BBA in DU then you have to qualify an entrance examination namely DU JAT. The eligibility criteria is that:

• Candidates who belong to the general category must have secured at least 60% marks in four subjects, which are: Mathematics, English, and any two elective subjects.

So without Mathematics you can't tale admission in BBA at DU.

To know more about DU JAT visit the link below:

https://bschool.careers360.com/articles/du-jat-eligibility-criteria

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