Saturday
October 25, 2014

Homework Help: math

Posted by alex on Saturday, May 28, 2011 at 1:38pm.

There are 900 three-digit integers. The number of three-digit integers having at least one repeated digit is also a three-digit number. If that number is represented by abc where each letter is a digit, compute
a-b+c

(I came up with 252 integers so when I did the computation it didn't make sense)

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