IIT

Hey Abbas,
In IIT mains you have to score min. of 27.78% if you're an open category student,
19.4% if you're obc category,
14.4% if you're sc category,
13.3% if you're st category.
The below information may also help you:
Minimum Marks in Qualifying Examination (QE) for JEE (Advanced) 2016:Admission to the 16 IITs and ISM Dhanbad will be based only on category wise All India Rank (AIR) in JEE (Advanced) - 2015, under the condition that such aspirants satisfyAT LEAST ONE OF THE TWO CRITERIAgiven below:
He/ she is in the top 20 percentile of successful aspirants of their respective Boards (or equivalent examination) in their respective categories.
2. He/ she has secured 75% (for GEN/ OBC - NCL) or 70% (for SC/ ST/ PD) in their respective boards (or equivalent examinations).
If the Board does not provide the information regarding the same, the candidate will have to produce a certificate from the concerned Board stating that he/she falls within the top 20 percentile.
If the candidate fails to do so, then the CBSE percentile will be used as the criteria for deciding minimum percentage of marks in the qualifying examination.If the Board awards only letter grades (without providing an equivalent percentage of marks on the grade sheet) the candidate should obtain a certificate from the Board specifying the equivalent marks, and submit it at the time of counselling.
In case such a certificate is not provided the decision taken by the Joint Implementation Committee (JIC) of JEE (Advanced) - 2015 will be final.