Sorry for not making this clear the first time, but the 1's and 2's are
dependent upon one another. I am trying to track the frequency of a set of
machines being off-line. For example, I am trying to determine when machines
1 and 2 were offline at the same time. I hope this clears up any confusion.
I am sorry that I was not clearer the first time.

"Toppers" wrote:

> If the 1s and 2s are independent , then is not simply:
>
> =Countif(A:A,1)+countif(A:A,2)
>
> OR
>
> =if(and(countif(A:A,1)>0,countif(A:A,2)>0),"both occur","only one or none
> occur")
>
> Or have I completely missed the point (again!)
>
> "SouthCarolina" wrote:
>
> > Thank you for your help. I can count the number of times the number 1
> > appears in the column with no problem. My problems start when I try to count
> > the number of 1's and 2's that occur simultaneously. I will continue to work
> > at it.
> >
> > "Toppers" wrote:
> >
> > > =Countif(A:A,1) will count number of 1s in column A
> > >
> > > HTH
> > >
> > > "SouthCarolina" wrote:
> > >
> > > > I am trying to determine when I have repeats in a list of data. This is the
> > > > situation:
> > > >
> > > > I have a list of data that contains numbers 1-99. I am trying to determine
> > > > when the numbers 1 and 2 appear in the same list and then count those
> > > > occurences. I have found a round about way of doing it, but do you know of a
> > > > faster way? Any help would be greatly appreciated. Thank you.