Luck of the draw

A while ago I bought a 50 pound sack of French coins. I have since sorted, stacked, counted, catalogued, bagged pretty good mix.

now I never had any interest in these modern 2 franc coins, just left em in a dish, and there were exactly five in the entire sack -


I had a look at them today, and it's like a lucky Poker hand, a straight flush.

That is astronomical. Any math brains on Numista that can figure out what the odds of that happening would be?

rough guess.....1 in a million

Quote: "johnspa"​ That is astronomical. Any math brains on Numista that can figure out what the odds of that happening would be?

​if it was pure coincidence and not a collector's dump for those 5 years, then judging by how common those years are for that coin, (these 5 years are the most common), if you add up the commonality of the rest of the years each of those specific years has a very rough average 1/6 chance. Meaning 1/6 to the power of 5 = 1/7776 (slightly higher because 1979-81 are 1.5 as common as 82-83).

So something like 1/7500. what are the chances of a royal flush? :D