Hello Hemant,

NIOS provides an opportunity for re-checking of answer scripts in which re-totaling and evaluation of left out part is done. The learner has to apply for re-checking within 15 days from the declaration of results with prescribed fee of Rs.200/- (Rupees two hundred only) per subject through bank draft, drawn in favour of Secretary, NIOS. 

Hope this answers your query, feel free to ask for more info.