How many different 3-digit numbers can be formed from the digits 1, 2, 3, 4, 5 if no digit is used more than once?

Answer and explanation

Correct answer: B. 60

  1. Step 1: The order matters, so use . Step 2. . Answer: 60. Why not the others: 125: That allows digits to repeat. 10: That ignores the order of the digits. 15: That multiplies and .

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