Cool snippet! Interesting to see that (at least on my Debian box) it takes a few dozen iterations to actually reach middle ground: 
perl -Mstrict -Mwarnings -E 'my $WIDTH = 50;
my ( $try, $i, $j ) = (0) x 3;
for ( 1 .. 40 ) {
    ++$try;
    my $rand = `perl -E "say rand()"`;
    $rand < .5 ? ++$i : ++$j;
    printf qq[%${WIDTH}s : %s\n],
      "#" x ( $i * $WIDTH / $try ),
      "#" x ( $j * $WIDTH / $try );
}'

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In reply to Re^2: Send x% of the users to A, the rest to B by Perleone
in thread Send x% of the users to A, the rest to B by DreamT

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