Hi candidate! So the admission to BBE includes two parts-

1.Boards marks

2.Entrance exam

These two combined to would get you an All India rank on the basis of which you will be alloted a college.

For general category student, BBE is possble with a composite score of 60 and above. So if you have marks greater than 70 then it will more benefecial for you.

Hope it helps.

Thanks.