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2003 AMC 10A Question 20

AMC10 · 2003 AMC 10A

Question 20

A base-$10$ three-digit number $n$ is selected at random. Which of the following is closest to the probability that the base-$9$ representation and the base-$11$ representation of $n$ are both three-digit numerals?
  1. $0.3$
  2. $0.4$
  3. $0.5$
  4. $0.6$
  5. $0.7$