hello,

If you fail in Maths Board exam then the only choice you have is to appear for Compartment Exams held in month of July in the same year.

Results of board exams are out in May or June therefore you will have one month for preparing. Yes, Compartment exams are tough but if you prepare well for it in one month then you can easily pass.

If somehow you don't pass in compartment then you have to re-appear for math exam in March 2021. That's the only option left.

Hope this was helpful.