Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human

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Home>Mathematics homework help>Numerical analysis homework help>Some researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human

It has been known from the past experience that two percents of your emails are spam. Suppose you will receive 200 emails. (a) Find the mean and variance of the number of spam emails among those.

(b) Using the Poisson approximation, find the probability that there will be at least 3 spam emails among those.