# Math

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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?

• Math -

A) 12 choose 3, calculated as

12! / (3! * 9!) = 12*11*10 / (3*2)

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