Hey sagar,

Maths was always a mandatory subject to opt bcom hons. If you don't have maths as one of your elective subject in 12th it won't be possible for you to take admission in any colleges of du under bcom hons course. For opting bcom hons in du one has to have maths as a subject also with atleast 50% marks in it.

Hope this is clear. 

Good luck!