Math Problem Statement
有 8 个,其中两个人不能挨在一块,有多少种可能?
Solution
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Math Problem Analysis
Mathematical Concepts
Combinatorics
Permutations
Inclusion-Exclusion Principle
Formulas
8! = 40320
2 × 7! = 10080
8! - 2 × 7! = 30240
Theorems
Inclusion-Exclusion Principle
Suitable Grade Level
Grades 8-10