Posted by **Alex** on Thursday, October 27, 2011 at 5:59pm.

We’re writing a test case that samples a “random” black box. Given n numbers, how many times would we need to sample the black box to have n unique responses with a 99.9% confidence?

Eg, if we were rolling a six-sided die, how many times would we need to roll it in order to see every number 99.9% of the time?

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