Kat H.

asked • 09/26/16

In a population of 22,000,000.00What is the probability of three people meeting randomly who lived within three houses from each other 43 years ago?

1973 - Perth West Australia,  population 900,000: age 12 :- I live in an apartment block of 40 units. 
1995 - Perth West Australia, population of 1,800,000: age 33 :- meet husband in a blind date. While married we discover he lived in that apartment block 21 years previously. 
2015 - Perth Australia, population 2,200,000.00: Australia Population 23,000,000: age 54 :-  
I receive a phone call from a stranger "john" who lives on the other side of the country in Townsville, Queensland.
He learned we share a mutual friend in Mexico - where I visited 9 months prior to him calling. 
3 months later,  he and his wife visit us in Perth and we discover they also lived in those apartments in 1973 - 43 years ago 
(They had moved state 14 years ago)

What is the probability this would happen? 

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