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# Count unique values (two columns of data)

I need to count the X's in column B only if the values in Column A are unique.

The example below would result in a count of 2 (one X for 5262, and one X for 6520)

I tried several formulas (sumproduct, countifs) but can't get the correct answer.

 5262 X 6520 6520 X 6520 X 6520 X 6520 X

### Abuse history

Hi,

This formula has to be entered as an array

=SUM(IF(FREQUENCY(IF(B1:B9="x",IF(A1:A9<>"",MATCH("~"&A1:A9,A1:A9&"",0))),ROW(A1:A9)-ROW(A1)+1),1))

with the formula edited press CTRL+SHIFT+ENTER