Hello,
As per CBSE Examination rules, a student is declared pass if he passes in English and 4 other subjects. So, since you have failed in 1 main subject and also in Economics than you will be declared failed and have to appear for compartment exam.
And hence you will NOT  be eligible for admission to undergraduate courses in any university.
Don't worry, usually the do not fail anyone by 4-5 marks, only those who score significantly lower than passing marks are failed.

Good luck

HELLO,

Yes, If you are passed in four subjects and you fail in one subjects. so, there is a way compartment exam.

if cbse fail you or not its totally depend on the examinar . even it's all about 3-5 marks .

It might be little kind of stressfull situation if you fail in any of the subject of class 12th because you need study that again and someone doesn't want to study again instead he/she prefer further study.

STUDY WELL!

GOOD LUCK