I WANT TO TAKE ADMISSION IN IIT MADRAS SO IN ADVANCE I HAVE 200 MARKS AND 85% IN STATE BOARD SO WOULD THEY WILL GIVE ME ADMISSION
JOSSA 2018 admission is over now. JEE Advance Exam pattern & Marks changes every year so it is difficult to predict exact about the score but try to score more than 50% marks to get admission in IIT Madras. You can also check the previous year cutoff rank of JEE Advance with the given below link.
https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-madras
Good Luck!