That kinda makes sense, but here's the typical consensus...
Randomness means each outcome is equally likely to happen. Given 4 possible outcomes, each is 25% likely to be chosen. Two of the answer choices (A and D) have the correct 25%. However, you don't choose these for answers, because the question is asking how likely it is to choose a correct choice at random from the four. 2 correct choices out of 4 gives B, 50%.
It's a real ***** question because the answer choices include two different classes of observations.
Its really not that hard, the answer is B) because since normally it would be 25% (A or C) that means you have a 50% chance of choosing the right answer which would be 25%.
if you think about it the entire question makes zero sense.
If you chose to answer the question AT RANDOM, then you aren't really making a descision you are basically closing your eyes and picking A B C or D out of a hat. The fact that they then ask you to answer that same question makes no sense since by answering it, you would not be doing it randomly.
well since there are two that say the same thing neither can be right therefore you are actually down to 2 options and thus a 50% chance meaning that B is the correct answer
And if you don't answer, it's C, forcing it to become A or D, but since it's both A and D at the same time, it becomes B, then loops at A and D to B...