Simply add two parts Mathematics, one part Physics, and one part Chemistry to get a total of 200.
For example, if you received 90 points in Mathematics, Physics, and Chemistry, your cut-off is 90/100 (Math) + 45/50 (Physics) + 45/50 (Chemistry) = 180/200. And you must compete with students from all other states, except Tamil Nadu, against their marks calculated in this manner, regardless of whether they are CBSE or not.
Anna University Chennai, Chennai