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 one person in the crew has previous experience in space flight. How many different crews of this type are possible?
Choose the correct choice from the following options.
A) 432
B) 94
C) 864
D) 1330
E) 7980
COMB(ENN) where E=experienced and N=no previous experience   12*9*8/(2!). We divide by 2! because there are 2! ways to choose the astronauts without previous experience.   =12*9*4 = 48*9   Because 48*9 ends with a 2, look for the answer that ends with a 2. Only 432 suffices.
<result>A</result>
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 one person in the crew has previous experience in space flight. How many different crews of this type are possible?