Hello!
Delhi University is one of the most esteemed universities in our country. The cut off for the colleges in Delhi University are generally way higher than all the other colleges. The cut off is sometimes as high as 99% for some streams. Considering such scenarios, it is unlikely for you to get an admission into the colleges of DU with a 75% score. 
I would suggest you try for other colleges like Christ University in Bangalore and Asian Business School in Noida which conduct their own entrance exams to take students in. 
All the best for your future! Feel free to contact us at any time.