First of all you have to fill an online form for which the registration link is generated by the university in the 1st or 2nd week of may.Filling of online form is compulsory as there is no offline procedure for admission.You will also be required to fill your class 12 board marks subject wise.Next, wait for the cutoff lists.For the Bsc courses in Mathematical Sciences, Computer Science, Mathematics and Statistics, cutoffs are calculated as the aggregate of marks in mathematics, one language subject and two best elective subjects.DU releases it's cutoff list. It will be available on the DU's website and on the associated colleges' websites.