Asked by Anonymous
Carmen is choosing a
3
-letter password from the letters A, B, C, and D. The password cannot have the same letter repeated in it. How many such passwords are possible?
3
-letter password from the letters A, B, C, and D. The password cannot have the same letter repeated in it. How many such passwords are possible?
Answers
Answered by
Steve
there are 4 choices for the 1st letter
since that letter is used, there are only 3 choices for the 2nd letter.
So, extending that logic, the number of possible passwords is 4*3*2 = 24
since that letter is used, there are only 3 choices for the 2nd letter.
So, extending that logic, the number of possible passwords is 4*3*2 = 24
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