Hi Deepali!! Hope you are doing well!!You don't need to worry  at all. Your boards aggregate marks don't affect on your aplication of banking jobs or jpsc at all. You can apply for different jobs like probationary officer or clerk at SBI, IBPS, etc. You can also apply at many other insurance companies. You  just won't be able to give RBI Grade B officer exam as it's eligibility criteria is about 60% in your boards. Still, you have sy options and also you can freely apply for upsc and prepare for it.

Hope it helps.

Feel free to ask any doubts in comment section.