Hi Simran,
Yes, you can get admission in B.Com in Delhi University. However, since you're from arts background, you'll have a disadvantage of a few marks depending upon the college you select. This is termed as Change of Stream disadvantage. For example, last year change of stream disadvantage for Shivaji college (DU) was 2.5%. This means if the cutoff for B.Com is 95%, you would get admission if you have more than 97.5%. Every year DU colleges release their prospectuses where they mention this disadvantage. Be sure to check the prospectus before going for admissions.
Best of Luck
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