A talent contest has 8 contestants. Judges must award prizes for first, second, and third places, with no ties. (a)In how many d

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问题 A talent contest has 8 contestants. Judges must award prizes for first, second, and third places, with no ties.
(a)In how many different ways can the judges award the 3 prizes?
(b)How many different groups of 3 people can get prizes?

选项

答案(a)336(b)56

解析

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