Probability pedant here. This is not entirely incorrect, at least to the extent it suggests that there's a matching relationship between the two 100s in 1/100 c

Probability pedant here. This is not entirely incorrect, at least to the extent it suggests that there's a matching relationship between the two 100s in 1/100 chance and 100 trials. If there is a 1% chance of something happening during an independent event, then to calculate the probability of it happening at least once across N events, you must use the formula 100% - 99%^N, where the 99% was derived from 100% minus the "1% chance" in the original scenario. So a 1% chance across 100 trials is 63.4% likely to happen. Look up the Birthday Paradox for more.