On average, how large a group is required for two people
to have the same birthday? I remembered the answer was
lower than I expected, but I forgot what the answer was.
Stuff like that bothers me. I suck at probability theory so
often use Monte Carlo method for solutions.
So who cares? If you are in a room with this number of
people with nothing to do (ie network is down), bet them
all a buck that two people in the room share a birthday.
Then send me a buck.
BuckFoo
#!/usr/bin/perl
use strict;
my $TRIALS = 1024;
my $total;
for (1..$TRIALS) { $total += trial(); }
$total /= $TRIALS;
print "$total\n";
sub trial {
my (%days, $i);
while (++$i) {
if ($days{int(rand(365))}++) { return $i; }
}
}
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