Tuesday, May 10, 2016

What is the probability that it takes more than seven rolls of a fair 6-sided die to roll a six?

What is the probability that it takes more than seven rolls of a fair 6-sided die to roll a six?



The probability of rolling a six per roll is 1/6. Therefore, the probability of rolling something other than a 6 is 5/6.




So wouldn't the probability that you don't roll a six within the first 7 rolls just be (5/6)7?

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