Alright, this is what I've been wondering ever since I got these blasted things. HOW DO YOU KNOW WHETHER THEY'RE COMMON, RARE, OR WHATEVER???
There are 5 common, 10 rare and 15 super rare. You have a checklist right? Figures #1 - #5 are the commons. Figures #6 - #15 are the rares. Figures #16 - #30 are the super rares.
This is how they worked it so each Booster Pack contains 1-common, 1-rare and 1-super rare.
If it was an even mix of all three types (i.e. 10-common, 10-rare, 10-super rare) the fact that there is one of each type in each pack would negate any "rareness" to any figure.