Central Board Of Secondary Education [CBSE] — Regarding low marks in class 10

Address: Delhi

Respected sir/mam
I am ujjwal kumar mahto student of Gourav Awas Uchcha vid Bansidih chas bokaro jharkhand
My roll number is 22297335 and my school code is 66543
Sir I got very poor marks in my class 10 results I never got such a less marks in my previous classes and every time I got above 90%and in the pre board exam that conducted I got 93% percentage but the marks that issued by the cbse is only 61% that is not satisfied marks due to such low marks my future career will be spoil and so please improvement my marks of the, 10class
Thank you