Hi Geoff
Try this:

=SUMPRODUCT((A1:A3="CO")*(B1:B3200))

HTH
Michael Mitchelson


"Geoff" wrote:

I want to have a table as such:

state population

CO 100
NE 200
CO 300

I want to count the number of times state is CO and Population is
200. In the example it should result in a count of 1.

How do i formulate this?

thanks.