Alexis rolls an 8-sided die 24 times. What is the probability a "five" is rolled at least 4 times, but no more than 18 times?
1 Answer
Apr 16, 2018
Explanation:
The binomial probability relation is:
Here we have
https://docs.google.com/spreadsheets/d/1jwBwig9fm-r-7F4nQSlk972MtMl13tRCMCwkrJGIL10/edit#gid=0
It turns out that at the cumulative probability, summed to 18 successes, we're so close to 1 that it's roughly a dozen 9's immediately after the decimal.
The cumulative probability at the 3 successes mark is roughly 0.6476.
Therefore, our probability is roughly 0.3524.