Originally Posted by SerialKilnWalkr
If it were both in 3 cases shouldn't it be 2:3 cases?
Yes, 2:3 cases = 1:1.5 cases.
What they're saying is that the odds of pulling a Season 1 card (that is, any Season 1 card) is 1:1.5 cases.
The odds of pulling a specific Season 1 card is 1:3 cases. (that is, the odds of pulling card#A3 is 1:3 cases and the odds of pulling card #A4 is 1:3 cases.)