Hans is choosing a 2- letter password from the letters A, B, C, D, and E. The password cannot have the same letter repeated in i
t. How many such passwords are possible?
2 answers:
There are 5 letters
there are 5 possibilities for the first letter, and 4 possibilities for the second letter after the first letter is used up
so 5 * 4 = 20 possibilities
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i think its b i'm not entirely sure
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