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2017 AMC 8 Question 20

AMC8 · 2017 AMC 8

Question 20

An integer between $1000$ and $9999,$ inclusive, is chosen at random. What is the probability that it is an odd integer whose digits are all distinct?
  1. $ \dfrac{14}{75} $
  2. $ \dfrac{56}{225} $
  3. $ \dfrac{107}{400} $
  4. $ \dfrac{7}{25} $
  5. $ \dfrac{9}{25} $