25% chance that guessing an answer on a 4 answer question will be true. However, two of the answers say 25%, which is 50% of the possibilities, which now invalidates those answers from being correct. With only answer being correct, it invalidates 50% from being the right answer.
It doesn’t reduce the numbet of possibilities. If you had 9999 true and 1 false, the chances are not 50/50
25% chance that guessing an answer on a 4 answer question will be true. However, two of the answers say 25%, which is 50% of the possibilities, which now invalidates those answers from being correct. With only answer being correct, it invalidates 50% from being the right answer.