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National Institute of Open School senior secondary Level home science practical examination is of total 20 marks. 20 marks is divided into practical works group A, group B, group c and another practical work marks  are for 4 each. Marks division of each group of Home Science practical Examination are for group A-4marks, for group B-4marks, for group c-4 marks, practical work marks-4 marks ,viva-voice -4 marks. So the total marks for groupA- 4+group B- 4+group c-4 +viva-voice marks -4marks total marks for home science practical of Sr secondary of NIOS is 20