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2026-10-15 00:12:58 UTC
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Wolf480pl on Nostr: Now I'm wondering... Consider a customer buying N spools of cable, randomly picking K ...

Now I'm wondering...

Consider a customer buying N spools of cable, randomly picking K of them, and checking the serial numbers of the banknotes in those K spools, and they are all on the list.

What is the expected number of counterfeit spools in the batch, depending on K and N?