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Rolling a Die Until Every Face Has Appeared (Math Chat)

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Visit this site: http://www.maa.org/features/mathchat/mathchat_1_7_99.html
Author:Frank Morgan, MAA Online
Description: How many times do you think you need to roll a normal die to be 90% sure that each of the six faces has appeared at least once? Why? Answer: It takes 23 rolls, as Al Zimmerman discovered in a computer experiment rolling 5000 dice until 90% of them had shown each face...
Levels: Middle School (6-8), High School (9-12)
Languages: English
Resource Types: Problems/Puzzles, Articles
Math Topics: Probability

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