It's a game of chance!
This time we have;
Behind 2 colors is 4 cards.
Behind 2 colors is 3 cards.
Behind 2 colors is 2 cards.
Behind 2 colors is 1 card.
Last time;
Yellow+Purple= 4 cards.
Red+Orange= 3 cards.
Grey+Green= 2 cards.
Blue+Brown= Nothing.