A) 12 choose 3, calculated as
12! / (3! * 9!) = 12*11*10 / (3*2)
2. Three members of a 12 person singing group are going to be chosen to sing a song in their coming concert.
A) how many different groups containing 3 people can be chosen from the 12 members of the singing group?
B) what Is the probability that mike and Jo will both be in the selected group?
1 answer
2 answers