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The formula of frequency or something? -It has to be absolutely accurate. Mathematics in the second day of junior high school. Thank you.
No, I can only say that every time I buy a lottery ticket, the winning rate is about 60%. If you buy all the lottery tickets, you will win three prizes, such as 1. But if it's just random sampling, it's accidental. The so-called probability is meaningful only if the sample set is large enough (theoretically a complete sample set).
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