Math Problem Statement
Một mật khẩu được tạo ra bằng cách hoán vị các chữ cái trong cụm INTERNET. Hỏi tạo được bao nhiêu mật khẩu khác nhau?
Solution
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Math Problem Analysis
Mathematical Concepts
Combinatorics
Permutations with repetition
Formulas
P = n! / (n1! * n2! * ... * nk!)
Theorems
Permutation with repetition formula
Suitable Grade Level
Grades 9-12
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