Rescind or not ? CBSE Board ;UMN-TC (CSE-Computer Science Major)

So I got a 80% in class 11th. Now the CBSE has cancelled my last board which was Comp Sci and I was bound to get a 95+ on it, which would make my average around 80-83% , but now they will put average makes on Comp Sci final, now my percentage would be 71-78% .
So would a 71-78% get me rescinded?? It’s still a B.