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How many three-digit positive integers exist, all of whose digits are 2's and/or 5's and/or 8's?

 
 Jun 5, 2021
 #1
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+2

First digit    3 choices

Second digit   3 choices

Third digit   3 choices                         3 x 3 x 3 = 27

 
 Jun 5, 2021

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