Solve the problem.
-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

Question

Quizplus · Accepted Answer

Since no letter can be used more than once and we need to form 3-letter codes from 5 different letters, we use permutations. The number of ways to arrange 5 items in groups of 3 is 5P3 = 5! / (5-3)! = 5*4*3 = 60.

Solve the Problem. -How Many 3-Letter Codes Can Be Formed Using the Letters