http://www.o-calc.com/?sec=_rip&lang=en
The chance to kill the moon is:
(100-sqrt(moonsize))*sqrt(number of deathstars)
The chance, that the deathstar is killed is:
(sqrt(Moonsize))/2
max chance in ze is now 99%, always a 1% risk. If your chance is lower than 99%, then second formula applies as well, if not and the 1% dont happen, all is well.
The chance to kill the moon is:
(100-sqrt(moonsize))*sqrt(number of deathstars)
The chance, that the deathstar is killed is:
(sqrt(Moonsize))/2
max chance in ze is now 99%, always a 1% risk. If your chance is lower than 99%, then second formula applies as well, if not and the 1% dont happen, all is well.