Dear Vushak, if you are talking about entrance examinations, it depends on the course you want to take up and the college you want to join in. As you haven't mentioned the course that you want to take up, we shall provide you general information. As you are still studying your 11th, it is important to improve your aggregate scores. Most courses prefer an aggregate of 50-60% as eligibility to appear for those entrance exams. Hope this helps.