BITSAT 2017 Eligibility Criteria -
Applicants should have passed class 12 or equivalent exam (from any state or central board of school education) with 75% aggregate marks in Physics, Chemistry and Mathematics/Biology. They also need to have secured 60% marks separately in each of the three subjects. Proficiency in English is another requirement for appearing in BITSAT 2017.
Only those candidates, who are appearing in class 12th in the year 2017 or have cleared 12th in 2016, are eligible for BITSAT 2017.
Top rankers or candidates with Rank 1 in the central or state boards in India will be offered admissions to the programmes of their choice, irrespective of their score/rank in BITSAT 2017, but must meet the aforesaid BITSAT eligibility criteria 2017.   
Note: Admissions to candidates will be purely based on the merit list, which will be prepared as per their scores in BITSAT 2017.

To know more about BITSAT Eligibility Criteria, you can go through below article -

BITSAT Eligibility Criteria 2017

Good Luck!!!