Central Board Of Secondary Education [CBSE] — Low result of 12th

Sir/maam
I am a student of Kathir Vidhya Mandhir coimbatore which was told to us as sri chaitanya . We students have been deceived by giving such low marks . The reason given to us was that the school's last year performance was low so the school had to give results according. From where does this even look fair for all the 90% above scoring students who have got only 80% and below marks . How can anyone compare a student's performance with last years performance. This is unjustifiable i request the cbse committee to look into this issue and make sure that all students have got the marks they deserve ...