If a U.S. Postal Service money order is numbered 1012065994?, where ? indicates that the last digit is obliterated, ? is ______. (Give your answer as a whole number.)

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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If a U.S. Postal Service money order is numbered 1012065994?, where ? indicates that the last digit is obliterated, ? is ______.

(Give your answer as a whole number.)
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