Central Board Of Secondary Education [CBSE] — Less mark awarded in cbse

My child studied in the school name kathir vidhya mandhir which is also known as srichaithanya located in neelambur Coimbatore tamilnadu...the school awarded low marks for the children in 12th grade the students who normally score less marks were awarded with more marks and students who were scoring good in their exam were awarded low marks which is below 400...this is purely inappropriate for the students...the students are very upset about their marks only 10 students out off 500 will be able get into a proper college other do not have any choice pls do consider this complaint and take action accordingly...Thank you