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It is reported that 17% of American households use a cell phone exclusively for their telephone...

It is reported that 17% of American households use a cell phone exclusively for their telephone service. In a sample of fifteen households, find the probability that:

Find the probability that no household uses a cell phone as their exclusive telephone service.

Exactly 9 households exclusively use a cell phone for telephone service.

Find the mean number of households exclusively using cell phones.

Math   Statistics-And-Probability   
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