It is 50% in Physics, Chemistry and Biology combination. You should pass in both Theory and Practicals in all your subjects and then score a minimum of 50% as an aggregate. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. Your individual scores might be anything but with a combination of Physics, Chemistry and Biology, your aggregate should be 50%, 45% or 40% based on your Category.