Earthquake

[zenga]

I just woke up so I apologize if I'm retarded but... Where do you get 72%? Can I see some math on this?

to compute the chance for 1 of several events to occur you multiply the complements (not sure if that's the proper english term)

so if toon A, B, C, D all have 27% crit chance, they all have 73% chance ito not crit (individually)

so
= (1-(!A*!B*!C*!D))*100
= (1-(0.73*0.73*0.73*0.73))*100
= (1-0.28.3)*100
= 0.72*100
= 72% chance that one of the 4 elemental shamans gets a crit when casting a spell at the same time

Another example:
Let's say a tank has a 10% chance to parry, a 20% chance to dodge and a 30% chance to resist an attack (non wow related), then what is the probability that one of those occur when he gets hit?
(1-(0.9*0.8*0.7)°100
or 49.6% chance that he will either parry, block or dodge, and a 50.4% chance jackshit will happen