I have failed in a subject in 12 and then cleared it next year.How will my aggregate be calculated?

Hello Frnds I am Sam.I sat for the TCS off campus drive this year.After clearing the online aptitude and interview I got the offer letter.As per the rules of TCS a candidate should have a minimum of 50% in all discipline.I have 50% in all discipline but there is a confusion.I failed in the physics paper in class 12 scoring 26% which I cleared in the following year scoring 49%.Now when I calculate my aggregate considering the failed mark(26%) my aggregate becomes 47% but if I consider the passed mark(49%) which got after clearing in the next year my aggregate becomes 50.6%.My question is while calculating my aggregate what will TCS take into account,my failed mark(26) or my pass mark(49)????waiting for your reply....Thanks in advance.....