Solved

Use the Permutations Formula
-How Many 3-Letter Codes Can Be $A , B , C , D$

Question 139

Multiple Choice

Use the Permutations Formula
-How many 3-letter codes can be formed using the letters $A , B , C , D$ , and E? No letter can be used more than once.

A) 60
B) 20
C) 10
D) 40

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