Hello Aspirant,

I hope you are doing well.

You must complete 6 subjects, of which 2 must be in a language. The remaining 4 must be in math, physics, social studies, and one more subject—call let's it computer science for now. If you receive an 80 out of 100 in those four courses, Cbse will calculate your percentage as the marks from two languages plus the marks from the other three subjects (CS will be left out). If you receive an overall score of 80 and 70 in math, the math will be ignored when determining your percentage. Maths is compulsory for IITS (javascript%3A;)

I hope this helps.

Good Luck