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probability statistics

If you put the beat back every time, the probability of getting a difficult beat is the same, that is, 2/ 10=0.2.

If you don't put it back, the winning probability has nothing to do with the order, just like a lottery, and it has nothing to do with the probability that you draw first and then draw, that is, it is still 0.2.

To sum up, 0.2