Your admission to any of the undergraduate programme offered in any of the college affiliated to the University of Delhi entirely depends upon the score and percentile obtained by you in the Common University Entrance Test (CUET UG) conducted by the National Testing Agency. As you have obtained 530 out of 800 in the CUET UG, it will not give you guarantee to get admission in the Delhi University, as the cutoffs vary every year depending upon number of factors such as the college, course, number of candidates who have applied for admission in DU, competition in the entrance exam, candidate's category, etc.