2005 AMC 10B Problem 20AMC 10 Step by Step
Name: Date: September 13, 2026
Basic Counting · difficulty 3 of 5 · about 3 min · position P16-20
What is the average (mean) of all 5-digit numbers that can be formed by using each of the digits 1, 3, 5, 7, and 8 exactly once?
- A)
- B)
- C)
- D)
- E)