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%HoA = ( A => [2.34, 4.12, 5.32], ... C => [8.42, 0.23, 0.45, 6.43], ###...and so on );
A 3.93 B 4.79 ...etc.
my $average; foreach my $key (keys %HoA) { ... my $av = $sum/$count; return $av; }