mariorgonzalezo9403 mariorgonzalezo9403
  • 03-03-2020
  • Mathematics
contestada

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?

Respuesta :

carielys64 carielys64
  • 03-03-2020

Answer:

3

Step-by-step explanation:

because  

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