(Answered) Question a group of 360 people is going to be split into

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Question: A group of 360 people is going to be split into 120 teams of 3 (where the order of teams and the order within a team don't matter).

(a) How many ways are there to do this?

(b) The group consists of 180 married couples. A random split into teams of 3 is chosen, with all possible splits equally likely. Find the expected number of teams containing married couples.

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