Here's a nifty twist on it.

#!/bin/perl

use strict;
use warnings;

my ( $name, $avg );

while (<DATA>) {
    my @list;
    ( $name, @list ) = split /,/;
    my $sum = 0;
    $sum += $_ for @list;
    $avg = $sum / scalar @list;
    write;
}

format STDOUT=
@<<<< @#.##
$name,$avg
.

__DATA__
AAA01,1.45,0.42,1.54,1.49,1.47,1.36,1.81,0.47,1.8,0.55 
ABA05,1.29,1.09,1.13,1.88,1.11,1.44,1.25,1.23,1.05,1.39 
BCD06,4.58,4.24,3.87,3.9,4.13,2.04,3.34,7.6,3.58,1.26,7.45
DFG12,26,26.34,24.59,26.46,26.24,26.14,32.35,31.77,31.77
MJK82,8.27,13.23,7.73,8.85,9.15,13.95,0,0,0,0,0
POU45,3.07,3.14,2.97,3.28,21.65,54.23,3.16,3.02,3.26 
RTY76,1.22,1.3,1.11,0.92,1.57,1.06,1.01,0.87,0.93 
SDH45,15.38,12,22.32,23.3,19.74,46.42,2.06,1.7,2.17 
WPL02,13.24,13.23,7.73,8.85,9.15,13.95,0,0,0,0,0
[download]

The output you get is:

AAA01  1.24
ABA05  1.29
BCD06  4.18
DFG12 27.96
MJK82  5.56
POU45 10.86
RTY76  1.11
SDH45 16.12
WPL02  6.01
[download]

Hope this helped,
-v.