There are 3 doors, among which there is 15K gold. Pick one door here
If you choose, there is nothing when you open one door here. At this time, is there a high probability of drawing 15K gold in the first choice or a high probability of drawing 15K gold in the second?
answer is below
The answer is that there is a high probability of picking the second time. The reason is that you can have 15K gold with a 1/3 chance in the first time, but
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Because it can be drawn with a probability of 1 in 2.