yep, combin(16,3) = 560

Guess I made a mistake on the number of interviewers and the OP's analysis.

--
Regards,
Tom Ogilvy


Harlan Grove wrote in message
...
"Tom Ogilvy" wrote...
There are 560 unique combinations of 20 people taken 3 at a time.

Last time I checked, COMBIN(20,3) was 1140 rather than 560.