It uses the binomial distribution to calculate the probability of getting any specific number of accidents.

保险公司就可以用二项分布公式,来计算特定数目事故发生的概率

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There are accidents, of course, but I think there always will be.

当然，确实会有事故发生，但我认为这是不可避免的。

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With 100 policies, they can't really count that accurately on having 20% of the policies paid.

对于100份保单来说,不是说事故发生率就是,保单总数的20%

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Homes just stay where they are, so we have far fewer accidents, so they don't have to charge as high a premium for the insurance.

而住宅则是固定的,所以发生事故的情况也更少,这就导致保险公司对住房保险收取的保费,不会太高

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This is a significantly high probability of accidents.

这个事故发生的概率是很高的

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The idea really took root--the idea, the intuitive idea is that as you write a large number of policies, the fraction that will result in accidents becomes closer and closer to the probability of one accident.

这种观点建立在...,观点是,只要你签的保单足够多,事故占保单总数的比例就会越来越接近,事故发生的概率

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I have the case where p = .2, so the probability of an accident is 20%.

假设这里的p等于0.2,也就是一次事故发生的概率为20%

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