#1**+2 **

Assuming SS is sum of squares then you can write:

V = (SS -n*m^2)/n where V is variance, SS is sum of squares, n is number in population and m is mean.

You can rearrange this to get n in terms of the other parameters, but you'll need to know the value of m to get a numerical value for n.

.

Alan
Sep 28, 2017