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[Edit] Find the average of a set of numbers

example

echo average(9,10,10,3,5); // 7.4 out of 10
Save 7,782 average 
function average() {
    $average = 0;
    for ($i=0;$i<func_num_args();$i++) {
        $average += func_get_arg($i);
    }
    $average = $average/$i;
    return $average;
}