Just a quick note if you are using Olasa's formula, all data must be
positive numbers.


olasa Wrote:
It can also be calculated in a single cell:

=INDEX(LARGE(A1:A20,ROW(INDIRECT("1:"&(COUNT(A1:A2 0)-COUNTIF(A1:A20,0))))),RANDBETWEEN(1,COUNT(A1:A20)-COUNTIF(A1:A20,0)))


Ola Sandström


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