I think I know why people score 56 and still fail.
If you score 55/80 = 0.6875 (which you fail).
For example, there is one question that is questionable and the answer can be either A or C.
You pick answer C, that you will score this one but the total question will be 79 and not 80. So you got 55/79 = 0.6962
(do not use 56/80 = 0.7)
You pick answer D, you will get 55/80 = 0.6875.
If you follow this thinking that there are 3 problems in questions. (Just like before if you gess right on those 3 questions) you will get 55/77 = 0.7143 (You just barely pass)---do not use 58/80 = 0.725
Again this is what just come to my mind and this thing might not be true.
If you score 55/80 = 0.6875 (which you fail).
For example, there is one question that is questionable and the answer can be either A or C.
You pick answer C, that you will score this one but the total question will be 79 and not 80. So you got 55/79 = 0.6962
(do not use 56/80 = 0.7)
You pick answer D, you will get 55/80 = 0.6875.
If you follow this thinking that there are 3 problems in questions. (Just like before if you gess right on those 3 questions) you will get 55/77 = 0.7143 (You just barely pass)---do not use 58/80 = 0.725
Again this is what just come to my mind and this thing might not be true.