=IF(COUNTIF(B2:B11,"A")=1,"C","D")

OR

=IF(ISNA(VLOOKUP("A",B2:B11,1,FALSE)),"D",IF(VLOOK UP("A",B2:B11,1,FALSE)="A","C","D"))

OR

=IF(ISNUMBER(MATCH("A",B2:B11,0)),"C","D")


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(Ms-Exl-Learner)
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"Jenn" wrote:

I need a function to determine if value "A" exists in range B1:B10. If A
exists in B1:B10, return "C". If A doesn't exist in B1:B10, return "D."

I have tried using lookup, I've tried index and match, I've tried
search/find. I can't make any of those do what I want it to.