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Given the four digits 2, 4, 6, and 7, how many different positive two-digit integers can be formed using these digits if a digit may not be repeated in an integer?

 Apr 19, 2018
 #1
avatar+18527 
+2

4*3 =12

First digit      second digit

2                    4, 6, 7

4                    6, 7, 2

6                    7, 2, 4

7                    2, 4, 6

 Apr 19, 2018

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