The affect of negative marks

Many students think that they should some how answer all the questions and try to do lottery and put answers , they think that as there is 0.25 negative marks if they by chance make a correct guess one out of 4 questions also still they will get +0.25 but your probabilities will fail pals . so don't try to answer un attempted questions its my sincere advice to u .Answer those questions which u have tried . If in the worst case , u are determined to put all answers then go for this option , tick all those questions with same option say B or C which is most common .