Four dice are rolled till the first six appears on one of them. What is the mean number of rolls required, inclusive the last one?

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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Four dice are rolled till the first six appears on
one of them. What is the mean number of rolls
required, inclusive the last one?
Transcribed Image Text:Four dice are rolled till the first six appears on one of them. What is the mean number of rolls required, inclusive the last one?
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