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by Smilliam 2984 days ago
Independent event probability. A 1% chance of something happening means that there is a 99% chance of the event not happening. 0.99^100 = 0.37. So a 37% chance of no brain eating out of 100 trials. 1 - 0.37 = 0.63, so a 63% chance of a brain being eaten out of 100 trials.