I have an exam tomorrow with 100 multiple choice questions. Each question has 4 options, only 1 is correct.
If I answer the question and get it right, I get 1 mark. If I leave it blank, I get 0. If I answer incorrectly, I lose 0.25 marks.
How should one approach the test? Mathematically/statistically are my odds better if I guess if I don't know the answer?