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

Question

Mathematics

Nick Hawkins

20 February, 15:03

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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Isaac Solis · Answer 1

Ok ... we got 250 people

30% are French, 35% are Americans, 20% are Germans ... thats 85%.

This means 15% are from other countries

3 not from other countries ...

0.85 * 0.85 * 0.85 = 0.6

0.6 (250) = 150 students <===