Two aspirants can know the same amount and score very differently — because one manages negative marking and the other doesn't. Most SSC, Railway and Banking exams deduct marks for wrong answers, so how you decide to attempt or skip is a skill worth practising as much as the syllabus itself.
Know your exam's penalty first
Negative marking varies, so compare it as a fraction of each question's marks. Many SSC papers deduct 0.50 on a 2-mark question (1/4). Most Banking exams deduct 1/4 of the question's marks (0.25 on a 1-mark question). RRB CBTs deduct 1/3, and some stages have none. Always confirm the exact penalty in your exam's official notification, because it changes the maths below.
The simple maths of a guess
- Blind guess, 4 options: roughly break-even on average (exactly zero under a 1/3 penalty, marginally positive under 1/4). It adds variance, not real expected gain, so it is usually not worth the time or risk.
- Eliminate 1 option (3 left): expected value turns positive under both 1/4 and 1/3 penalties — a reasonable guess if you are genuinely confident the eliminated option is wrong.
- Eliminate 2 options (2 left): an educated guess is usually +EV (worth it) — your odds (50%) beat the penalty.
- Know it: attempt with confidence, every time.
The rule of thumb
If you can confidently rule out at least one option, a guess is mathematically favourable; with two ruled out it is clearly worth it. If you can't eliminate anything, skipping costs you almost nothing. This single habit protects the marks you've already earned from being eaten by penalties.
The biggest leak: over-attempting
In review after review, the most common reason for a low score isn't too few attempts — it's too many. Aspirants attempt questions they're unsure of, and negative marking quietly erases their hard-earned marks. Discipline to skip is a scoring skill.
How to build the instinct
- Do two passes: first attempt only the questions you're sure of, then return for the educated guesses.
- Mark-for-review instead of forcing an answer the first time you're unsure.
- After every mock, check how many wrong answers came from low-confidence guesses — that number should fall over time.
This is exactly what timed mock practice trains. Every Kamiyab mock records your per-question confidence and shows how attempts and accuracy interacted — so you can see your over-attempting leak and close it before the real exam.
Exams covered in this article
Frequently Asked Questions
Is it good to guess in competitive exams?
Only educated guesses. If you can eliminate two or more options, a guess is usually worth it. Blind guessing is roughly break-even on average under standard negative marking (zero at 1/3, slightly positive at 1/4), so it adds risk without meaningful gain — skip when you can't eliminate anything.
How much is the negative marking in SSC and Banking exams?
It varies by exam and stage. Many SSC papers deduct 0.50 on a 2-mark question, and most Banking exams deduct 0.25 on a 1-mark question. Both work out to 1/4 of the question's marks, and some stages have none. Always confirm the exact value in the official notification.
How do I stop losing marks to negative marking?
Attempt in two passes (sure answers first), skip questions where you can't eliminate options, and review your mocks for low-confidence wrong answers. Controlling over-attempting is usually the single biggest score gain available.
Stop reading. Start practising.
Alivia Basu researches and writes Kamiyab's exam guides and preparation strategy, cross-checking eligibility, exam patterns and dates against official notifications before publishing.
All articles by Alivia Basu →