If you choose an answer to this question at random, what is the chance you will be correct?
The answer depends on how you distribute the probabilities when you do the random choice.
If you make the random choice by throwing a cubic die like the one you can construct from the sketch below the answer is 50%
If you want to restrict the scenario so that you’re only allowed to use a randomization method where the results A to D are equiprobable, then the answer is 0% because none of the four answers can be correct.
If you make the random choice by throwing an octahedron shaped die like the one you can construct from the sketch below the answer is 25%