Small probabilities multiply

Statistically, if one repeats a slightly risky activity many times, the small probabilities that something bad will happen are multiplied together, when considering the set of all instances of the activity. For example, if you drive to work 10,000 times, though the likelihood of you having an accident on any given trip might be small, the likelihood of you having an accident at some point during those 10,000 trips is quite high. Please be careful.

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