=AVERAGE(IF(C8:C10025000,C8:C100))

which is an array formula, it should be committed with Ctrl-Shift-Enter, not
just Enter.
Excel will automatically enclose the formula in braces (curly brackets), do
not try to do this manually.
When editing the formula, it must again be array-entered.

--
HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)

"ed both" wrote in message
...
i am trying to calculate the average of a column for values above 25000
using
following formula : =average(if(c8:c10025000,c8:c100,"")) but can't get
it
working - any good ideas ? - thanks !!