Mathematics, 01.09.2019 18:00 kamiyaharris1

At a conference of 250 people, 30% of the participants are french, 35% are americans, 20% are germans, and the rest are of the other nationalities. among any 3 participants, what is the probability that they are not all from other countries? a: 50 b: 75 c: 150 d: 175

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