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Source: GWD

Level: 3

If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?

  • A 5 to 4
  • B 3 to 2
  • C 2 to 1
  • D 5 to 1
  • E 6 to 1

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