How to deal with a group of undead properly

okay, the other one was long so im just gonna summarize this up in a couple of sentances. The key thing to do to deal with groups of zombies is this: DONT PANIC! You can deal with groups of 7 to 15 easily only if you keep your head! And with the right tools and quick thinking, you can deal with this situation properly. Or you can run away if at all possible.