"Hate" cards? What means this? (Sadly, I'm guessing another term that I'm not terribly familiar with, d'oh!)
Do you mean cards that only exist to spite or ruin other cards (that's what I'd assume based on the usage). I have to admit I do somewhat agree with Terrorshard (cool name, that) in this regard. Spellfire tried to keep its balance doing things that way and it just didn't really work all that well. ![]()
I think I'll let the people who really know their stats Fu work it out. Their Tiger Claw Style is stronger than my Tubby Panda Crane 
The answer is indeed 60%. Despite Bountyhunter's praise please point out any mistkes I make as I'm only really an interested amateur when it comes to this type of stat and probability work. I've only just started to learn negaitve binomial distribution but as I understand it this is the process that you'd use to calculate mulligans (although as you can only mulligan once it's easy to calculate it by hand).