# How to Calculate UPSC Prelims Total Score after Negative Marking

By Arpit Kumar Jain|Updated : May 23rd, 2017

It is essential that one knows about the marking pattern of UPSC IAS civil service exam. This help them in calculating their probable marks after the exam. As well as, before the exam it helps aspirants in getting an estimate about how many question to attempt to get certain marks.

In prelims, every question is of 2 marks. So, if a student answers a question correctly then 2 marks will be awarded to him. But there is also a penalty on wrong attempt. For every question marked wrong UPSC deduct one-third of the question’s mark. Since every question carries 2 marks, so penalty for every wrong answer will be 2/3 i.e. 0.67 marks.

So, suppose a student attempted 79 questions in the prelims exam. Now if he marks 64 question correctly but 15 question wrong. Then his expected score would be: 64(2) – 15(.67) = 128 – 10 = 118 marks.

Student should understand this method of calculating marks correctly. As this will help students in finding how much question they need to attempt to get a particular score.

For example, if a student aim to get 120 marks in UPSC IAS prelims then he can have several permutations of the question to be attempted to get those marks.:

• If he attempted 90 questions than he can afford to marks around 22 question wrong: 68(2) – 22(.67) = 121.33 marks.
• If he attempted 80 questions than he can afford to marks around 22 question wrong: 65(2) – 15(.67) = 120 marks.
• If he attempted 70 questions than he can afford to marks around 8 question wrong: 62(2) – 8(.67) = 118.67 marks.

It is generally seen that those students who don’t try to estimate, how many question they need to attempt to get a particular score, generally over attempts the number of question which led to large negative marking.