Shortlisting Ratios Explained: 15x Vacancies, 1:1 Verification and 80:20 Merit with Worked Examples

Recruitment notices are full of phrases like "15 times the vacancies", "1:1 ratio" and "80:20 weightage". They decide who moves forward and who is left out, yet they are rarely explained in plain language. This guide uses real examples from the current NTPC and NICL notifications, and the SBI PO structure described on our calculator page, to show exactly how each rule works.

1. Shortlisting Ratios: "15 Times the Vacancies"

In the RRB NTPC graduate notification, candidates are shortlisted from Stage 1 for Stage 2 at 15 times the community-wise vacancies of the RRB they selected. The NICL AO notification similarly shortlists about 15 times the vacancies from Phase I, subject to availability. Two points are easy to miss:

• It is applied separately for each category. If a board has 80 unreserved vacancies, it calls about 1,200 unreserved candidates; if it has 20 EWS vacancies, it calls about 300 EWS candidates. Each category has its own lowest qualifying score.
• The cut-off is an outcome, not a rule. The ratio fixes the number of candidates; the cut-off is whatever score the last of them obtained. A tougher paper or fewer vacancies pushes the cut-off down in raw terms, and a high-scoring year pushes it up.

Worked example

These vacancy numbers are invented to show the method; real figures come from each board's notice.

2. The 1:1 Ratio

For NTPC, document verification and medical examination are called at a 1:1 ratio with vacancies, based on Stage 2 merit. That means a candidate near the bottom of the list is not safe, because candidates drop out at verification (documents, medical, eligibility) and are replaced from the waiting list only if the rules allow it. The NICL notification says a waiting list of up to 50% of vacancies may be prepared.

3. Weightage: How 80:20 and Similar Splits Work

When a notice says final merit uses "80:20" between Mains and interview, it means the Mains objective score counts for 80 points and the interview for 20 points of a combined 100. To combine them, each score is first converted to the same scale. The exact conversion is defined in each notification, so the example below shows the idea with an assumed conversion to a 100-point scale.

Take a NICL generalist who scores 170 correct and 40 wrong in the 250-question Mains objective test: 170 − (40 × 0.25) = 160.00 out of 250, or 64.0 on a 100 scale. With an interview score of 70 on a 100 scale, the final merit is 0.80 × 64.0 + 0.20 × 70 = 65.20.

Why a strong interview cannot fully rescue a weak Mains

A 10-point improvement in the interview adds only 2 points to the final merit, while a 10-point improvement in the Mains (on the 100 scale) adds 8. In close competition both matter, but the Mains remains the heavier lever, which is why the bulk of preparation time should go there.

4. Scaled Scores: The SBI PO Structure

As described on our SBI PO calculator page, the Mains objective and descriptive papers add up to 250 marks, scaled down to 75, and the Group Exercise and Interview (50 marks) are scaled down to 25, giving a final merit out of 100. Here is how a candidate scoring 150 of 250 in Mains and 35 of 50 in Phase 3 would be placed:

Scaling keeps the ratio of the two stages at 75:25 regardless of how many raw marks each stage carries.

5. What to Do With This

• After a prelims or Stage 1 test, compute your net score from your response sheet and compare it with the previous year's cut-offs for your category, not the overall figure.
• Remember that raw and normalised scores differ in multi-shift exams like NTPC, so see our normalisation guide.
• Read the notice for the exact conversion, tie-breaker and waiting-list rules; they differ from exam to exam.

Related: RRB NTPC 2026 guideNICL AO 2026 guideSBI PO calculator

About the author. Thaseen Fathima is a B.Tech CSE (AI) student at Vignan Institute of Engineering and Technology, Visakhapatnam, who builds examination calculators and writes the guides behind them.