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How do you filter an array formula (that uses average) in Excel by using a flag in column C? I want to find the average value for all records that share the same ID and have a flag of "Y". For example, in the below, column D would read:
C
"Y"
D
In D2:
=(C2="Y")*(AVERAGEIFS(B:B,A:A,A2,C:C,"Y"))
And copy down.
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