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If \(x\%\) of four-digit numbers have a repeated digit (the repeated digits do not need to be adjacent), then what is \(x\)? Express your answer as a decimal to the nearest tenth.

 May 5, 2021
 #1
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The number of 4 digits that don't have a repeated digit is 9*9*8*7. 

The total 4 digit number is 9*10*10*10. 

1 - (9*9*8*7)/(9*10*10*10) is our answer. :))

 

=^._.=

 May 5, 2021

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