As you have not mentioned the course or any specifics, I am giving you the general answer.

For admission in undergraduate course you need atleast 50% marks in 10+2. Although some institutes are there which offer admission only above 75% which varies. But this is the most general case.

For Post graduation, most institute specifies atleast 55% in graduation.

For more specific answer you may re-ask in the career360 QNA section with appropriate specifics.

I hope my answer helps. All the very best for your future endeavors!