At the school playground there are 20 red playground balls t

At the school playground there are 20 red playground balls that students can check out to play with. Eight of the balls are of superior quality and bounce well enough to support a decent game of double four square. If we need two of the superior quality balls to play the game and the four players each randomly select a playground ball to check out, what is the probability that we will be able to have a decent game (i.e., have at least two superior quality balls)?

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