Overall Calculation of Marks in NDA Exam

The overall marks in the NDA (National Defence Academy) exam are calculated based on the performance of candidates in both the written examination and the SSB (Service Selection Board) interview. Let's discuss the calculation process in detail:

Written Examination:
The written examination consists of two papers: Mathematics and General Ability Test (GAT). The maximum marks for each paper are 300. The marking scheme for the written examination is as follows:
- For each correct answer, candidates are awarded 2.5 marks in Mathematics and 4 marks in GAT.
- For each incorrect answer, 1/3rd (0.83) marks are deducted in Mathematics and 1.33 marks are deducted in GAT.
- If a candidate marks multiple answers for a single question, it is considered incorrect, and the same negative marking is applied.

SSB Interview:
The SSB interview is a five-day selection process that evaluates a candidate's suitability for a career in the armed forces. It comprises various tests, including Psychological Tests, Group Testing Officer Tasks, Interview, and Conference. The SSB interview carries a maximum of 900 marks.

Calculation Method:
To calculate the overall marks in the NDA exam, the following steps are followed:

1. Written Examination Marks:
- Calculate the total marks obtained by the candidate in Mathematics and GAT separately.
- Add the marks obtained in Mathematics and GAT to get the written examination score.

2. SSB Interview Marks:
- The marks obtained by the candidate in the SSB interview are considered as-is.

3. Total Marks:
- Add the written examination score and the SSB interview score to get the total marks.

4. Merit List:
- A final merit list is prepared based on the total marks obtained by the candidates.
- Candidates who secure the minimum qualifying marks in both the written examination and the SSB interview are included in the merit list.

It is important to note that the final selection of candidates is subject to medical fitness and eligibility criteria. The NDA exam is highly competitive, and candidates need to perform well in both the written examination and the SSB interview to secure admission to the National Defence Academy.

In conclusion, the overall marks in the NDA exam are calculated by combining the marks obtained in the written examination and the SSB interview. The written examination marks are calculated based on the marking scheme for each paper, while the SSB interview marks are considered as-is. The total marks are then used to prepare a merit list for the final selection of candidates.