Hello,

UPSC does not give any weightage to class 12th marks. T here is no minimum marks requirement for taking SSC and UPSC. So it does not matters how much do you scored from any board.

What UPSC demands is the graduation degree. You must be graduate and eligible according to age, to take UPSC.

On the other hand SSC, based on exam may require 10th passed, 12th passed or graduation degree as education qualification.

Hope it helps.

All the best!!