For some students, all possible outcomes of an experiment can only
have two results, they occur or do not occur, each with a 50% chance. Item
I4(4) asked students whether it is impossible, possible or certain that in
drawing three cards, one from each pack, the result would be the 2 of
diamonds, 5 of diamonds and the 8 of spades. Student f1061340, a grade 6
student in an advanced school, gave the following reply: