Hello there. Hope you are doing good. I would like to tell you that Delhi University does not offer BBA course. It offers Bachelors of Management Studies, B.Com (//B.Com) programme instead which are quite similar to BBA. The admission in BMS course is through entrance test DU JAT and B.Com (//B.Com) offers admission through merit basis, i.e on the basis of aggregate percentage obtained in 10+2. You can look for more details on DU official website.

I hope you found this answer helpful. Good luck for your future.