Question: 9. A personal identification number (PIN) that opens a certain lock consists of a sequence of 3 different digits from 0 through 9, inclusive. How

9. A personal identification number (PIN) that opens a certain lock consists of a sequence of 3 different digits from 0 through 9, inclusive. How many possible PIN are there? (A) 120 (B) 360 C 720 (D) 729 (E) 1,000 172

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