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.
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. :))
=^._.=
+216 
