Math Problem Statement
You have a bike lock with a 4-digit combination. Each space can be any number 0 – 9. The only restriction is none of the numbers can be duplicated once they are used. How many possible combinations can be formed?
Solution
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Math Problem Analysis
Mathematical Concepts
Permutations
Combinatorics
Formulas
nPr = n! / (n-r)!
Theorems
Fundamental Principle of Counting
Suitable Grade Level
Grades 9-12