Statistics problem

I have a statistics problem that I just can not figure out the answer to: What is the probability that a namefag is neither a troll nor a moron? I think the answer is 0, but I haven't been able to prove it yet.

>>4
x = 100%, y = 100%. It is certainly the case that the probability that a namefag is neither a troll nor a moron is 0%, since there is a 0% chance that he/she/it isn't a troll. By your formula (step 5), the probability of a namefag being neither a troll nor a moron is (100 - (100 + 100)/100 - (100/100 * 100/100))/100 = (100 - (200/100) - (1 * 1))/100 = (100 - 2 - 1)/100 - 97/100 = 97%.

Of course, I guess I shouldn't be surprised that you fail at elementary statistics, seeing as you fail at every other form of math.