if either column A has "yes" or column B has "yes", column C should show
"yes" too but if BOTH columns "A" or "B" has "N/A" "C" should say "N/A",
With you guys formula "C" is giving me "No"

let make this
A B C
Yes no yes
No Yes Yes
Yes Yes Yes
No no No
N/A N/A N/A

Do you mean "N/A" as an enter piece of text??? If either column contains a
genuine N/A error, then column C will get an N/A error too. Instead of
putting "N/A" as text in one or both columns, use =NA() and watch what our
functions do.

Rick