averageif

D

daddylonglegs

There isn't a specific single function but in general if you want the
average of B1:B10 when A1:A10 is "xxx" then either

=AVERAGE(IF(A1:A10="xxx",B1:B10))

confirmed with CTRL+SHIFT+ENTER or

=SUMIF(A1:A10,"xxx",B1:B10)/MAX(1,COUNTIF(A1:A10,"xxx"))

which just requires ENTER
 
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