
Remodeled Assessment Scheme of Class X Board Examination from Academic year 2017-18 (NSQF Scheme)
The CBSE has remodelled its assessment scheme allowing Class X students in vocational stream who fail in any of social science, mathematics and science papers to replace it with a vocational subject.
However, if a candidate wishes to reappear for the failed subject, he/she can appear in the compartment examination.
Source: http://cbse.nic.in/newsite/circulars/2017/ScannedCopyof%20CircularNo11.pdf