Rolling a Die Until Every Face Has Appeared (Math Chat)
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|Frank Morgan, MAA Online|
|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)|
|Resource Types:||Problems/Puzzles, Articles|
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