lena is choosing a
2
-letter password from the letters a, b, c, d, e, and f. the...
![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 29.11.2019 22:31, somethingar183
lena is choosing a
2
-letter password from the letters a, b, c, d, e, and f. the password cannot have the same letter repeated in it. how many such passwords are possible?
![answer](/tpl/images/cats/otvet.png)
Answers: 2
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