AMC 10B 2005 Problem 20

Past Contests AMC 10 AMC 10B - 2005
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1

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?

Answer Choices
A. 48000
B. 49999.5
C. 53332.8
D. 55555
E. 56432.8