=Sumproduct(--(A1:A100="betty"),--(B1:B100="robert"))

--
Regards,
Tom Ogilvy


"aet999" wrote:

I have a spreadsheet with many columns. I would like to count how many
occurances there are of two criteria matching. Example, If column A contains
names of girls (amy, betty, susie, karen, betty) and column B contains names
of boys (michael, robert, andrew, james, joseph). how many times does column
A = betty AND column b = robert on the same row? In this example, the answer
would be one.