Hello there ,
Your question is a bit unclear,  different colleges of B.Sc has different cutoff and there are different eligibility criteria for different colleges.
For getting admission in popular universities like the university of Delhi or Mumbai university,  you need a minimum of 90%.
Hope I am clear

hello aspirant,

see different colleges has different cutoff  structure and it changes every year. it also depends on question level and number of participants. however you have not mention in which course or stream in bsc you want to apply for and which stae you belongs to. if you want to know about any particular colleges you may ask here.