Class X students have to presently study five subjects -- two languages, social science, mathematics and science.
Students also have a choice of studying a vocational subject as an "additional" course.
However, from the 2017-18 academic year, it will be compulsory to study a vocational subject for students opting for the particular stream.
The Central Board of Secondary Education (CBSE) has remodelled its assessment scheme for Class X Board examination for schools offering vocational subject as compulsory subject under the National Skills Qualifications Framework (NSQF).
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"The board exam result will be computed accordingly. However, if a candidate desires to reappear for the failed subject they can appear in the compartment examination," it added.
Students will have 13 options to choose from for the sixth subject -- Dynamics of Retailing, Information Technology, Security, Automobile Technology, Introduction to Financial Market, Introduction to Tourism, Beauty and Wellness, Basic Agriculture, Food Production, Front Office Operations, Banking and Insurance, Marketing and Sales, and Health Care Services.
A candidate will have to score 33 per cent marks in both board exam and practical exam to pass the subject.
In another major decision, the CBSE has decided to do away with seven Academic Electives and 34 vocational subjects for Class XII because of low enrolment numbers.