Homework Help: Algebra

Posted by Lori on Tuesday, November 15, 2011 at 12:58pm.

How many three symbol codes using the digits 3 through 9 are possible if repetitions are allowed? (243 is an example of a three symbol code).

Algebra - Steve, Tuesday, November 15, 2011 at 6:04pm
There are 7 digits possible for each of the 3 positions in the code. Thus, there are 7^3 = 343 possible codes.

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