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Old October 22nd, 2008, 05:10 PM posted to microsoft.public.excel.worksheet.functions
TomPl
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Default How to omit blank cells when calculating weighted averages

Though it does the same thing, I like this formula a little better:

=SUMPRODUCT(B55,$B$2:$D$2)/SUMPRODUCT(--((B55)0),$B$2:$D$2)

Tom