Hello dear aspirant
For B. Sc mathematics and computer science,  your aggregate percentage of best four subjects is taken into consideration and hemce 80.33% doesn't tell about your chances of admission in DU. Since you belong to OBC,  you have a upper hand over the general category
This year the expected cutoff is higher than last year,  so the cutoff may actually increase.
Still,  you need a minimum aggregate BFS of 85% to get into any of these two courses in Delhi University.

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