Hi aspirant, If you are going for BSc CS in Delhi University then you should have an aggregate of 60% or more marks in english, Mathematics,  and best of two from physics , chemistry , computer Science/ Informatic practices .

Hope you understand the point.

greetings,

you have to include the best four marks for calculation of best of four percentage.

english and maths are compulsoty.

other can be chemsitry/physics/biology etc

previous year cut-off:

http://www.du.ac.in/cut-off.html

syllabus:

http://cs.du.ac.in/programmes/bsc/

http://www.du.ac.in/du/uploads/Syllabus_2015/B.Sc.%20Hon.%20Computer%20Science.pdf

hope this helps.

good luck