I want to know about success rates at preparatory course offered at IIT.How many candidates opting for preparatory courses have successfully admitted to the normal IIT course ?My rank is 76 in open PWD in JEE 2015

After the preparatory completetion students are allotted to the ramining lef over seats and these left over seats are very much less in medium branches like metallury chemical biotech etc and pc students more options like MSc. For branch selection they hsve to fillup the branches that are leftover.Success rate will be baesd on ones performance though out the graduation