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Re:South Africa's lottery probed as 5, 6, 7, 8, 9 and 10 drawn by BlackFingolfin on Thursday December 03, 2020 @03:46AM (#25286926)
According to a comment elsewhere in this HN discussion, it seems there are rather something like <200 draws a week. That gets us to just a 3% chance of this happening in a given year. That's still quite a bit more than one might intuit, but not quite as drastic.

Of course, as others here already pointed out that there are far more "suspicious" patterns (e.g. other arithmetic progressions like 5-10-15-20-25-30, primes, ...). And of course they often play by different rules, etc.

Re:South Africa's lottery probed as 5, 6, 7, 8, 9 and 10 drawn by T-hawk on Thursday December 03, 2020 @02:29PM (#25293408)
3% chance in a given year. And for how many years when it didn't happen have we been running this many lotteries? Probably right around 33.