Sunday, October 8, 2017

dice - Probability of rolling unique sides on a bias die

If you have a six-sided die labeled 1-5 with two sides labeled 5, what's the probability of rolling the die five times and getting a unique side that you haven't previously rolled?



I've been mulling this one over for some time, and can't seem to get around the idea that the probability seems to change depending upon when you roll a 5. There must be a logical work around.

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