It's 4%, AKA the Go Fuck Yourself Post.

[Lorake]

So with just looking at your results you're saying there's a 21.7% chance of someone being double targetted in only 7 chases? I haven't even started to plug in numbers and this is already starting to look good!!!

Just to verify - You are going to try to find A: the probability of an Anub double target on 7 chases, not B: the probability of Anub double targetting on a specific person in raid in 7 chases. If you're trying to find B this argument is moot and you just aren't listening.