Birthday problem: Difference between revisions
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Quicky approach (use a population of 1e5 people to get a quick estimate and then refine against a population of 1e8 people):
<lang J>bd5=:
bd8=:
cnt=: [: >./ #/.~
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)
est=: 3 :0
approx=. (bd5 Prb&y i.365) I. 0.5
n=. approx-(2+y)
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