Mathematics
Mathematics, 03.03.2020 03:18, yesharabaskoro

From a group of 21 astronauts that includes 12 people with previous experience in space flight, a 3-person crew is to be selected so that exactly 1 person in the crew has previous experience in space flight. How many different crews of this type are possible?

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From a group of 21 astronauts that includes 12 people with previous experience in space flight, a 3-...

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