A basket contains 6 red - 5 green and 8 blue balls. If four balls are picked at random - what is the probability that all four of them are either red or any two out of the four are green ?

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A basket contains 6 red - 5 green and 8 blue balls. If four balls are picked at random - what is the probability that all four of them are either red or any two out of the four are green ?