Hi Aspirant,

See the cutoff criteria for 12th standard marks may be 55 percent but you need to score a percentage of about 80-97 percentage to get in to some good colleges in Delhi like University of Delhi,Hansraj College,Hindu College,Miranda House,Ramjas college etc.This college demands a higher percentage and the competition is too high.If you can score above 85 percent you mark a safe side to get admissions in some real good Bsc colleges in Delhi.

Hope it helps!!