REBOL [
    Title: "Average"
    Date: 3-Jul-2002
    Name: Average
    Version: 1.0.0
    File: %Average.r
    Author: "Andrew Martin"
    Needs: [%Accumulate.r]
    Purpose: "Averages the values in the Block."
    Email: Al.Bri@xtra.co.nz
    Web: http://valley.150m.com
    Category: [math 1]
]

Average: func [
    "Averages the values in the Block."
    Block [block!] "Block of values."
    ] [
    divide accumulate 0 Block :+ length? Block
    ]