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QUESTION
A sailing club has nine human members (1,. . . ,9) and four sailboats (A,B,C,D). (a) How many distinct two-member crews can be formed?
A sailing club has nine human members (1,. . . ,9) and four sailboats (A,B,C,D).
(a) How many distinct two-member crews can be formed?
(b) In how many distinct ways can all four sailboats be assigned two-member crews?
