How many 2-letter combinations can be made from the letters a, b, c, and d?
a.
4
...
![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 23.01.2020 03:31, cmanglona
How many 2-letter combinations can be made from the letters a, b, c, and d?
a.
4
c.
8
b.
6
d.
12
![answer](/tpl/images/cats/otvet.png)
Answers: 2
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