Returns the average
(arithmetic mean) of all the numbers in a range of cells in the whole workbook.

For example, you
can use AVERAGE3D to return the average of the numbers in a given range in the
whole workbook. You just need to specify a range, and AVERAGE3D will go through
the same range in all worksheets in the workbook and find out the answer for
you.

AVERAGE3D is very
similar to the AVERAGE function of Microsoft Excel. The main difference is that
AVERAGE3D considers all worksheets, while the original AVERAGE function doesn't.

Syntax

AVERAGE3D(range_input,
include_current)

range_input
- is the range for which you want to determine the average.

include_current
- Optional. Boolean argument , either TRUE or FALSE. Decides whether the current
worksheet is included in the function's consideration. TRUE means the current
worksheet will be considered, and vice versa.

Range(s) that
include error values or text that cannot be translated into numbers cause errors.

Tip

When averaging
cells, keep in mind the difference between empty cells and those containing
the
value zero, especially if you have cleared the Zero values check box on the
View tab (Options command, Tools menu). Empty cells are not counted, but zero
values are.