You need to secure an aggregate of 60% in Physics, Chemistry, and Mathematics/Biology in the qualifying examination in 10+2 or two-year Pre-University examination conducted by a recognized Board/ University.

I am listing the eligibility criteria for the VITEEE 2019 below :

• Class 10+2 conducted by the State Board/CBSE/ISCE.
• Intermediate or 2-year Pre-University Examination conducted by a recognized Board/University.
• Aspiring candidates must have secured an aggregate of 60% in Physics, Chemistry, Mathematics / Biology in the qualifying examination. 
• The combined PCBE/PCME marks should be 50%.
• High School Certificate Examination of the Cambridge University or International Baccalaureate Diploma of the International Baccalaureate Organisation, Geneva.
• General Certificate Education (GCE) examination (London/Cambridge/Srilanka) at the Advanced (A) level.

I hope this resolves your query :)