It is reported that 16% of American households use a cell phone exclusively for their telephone service.
Question:
a. Find the probability that no household uses a cell phone as their exclusive telephone service.
b. Find the probability that exactly 5 households exclusively use a cell phone for telephone service.
c. Find the mean number of households exclusively using cell phones.
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Related Book For 
Statistical Techniques In Business And Economics
ISBN: 356
16th Edition
Authors: Douglas Lind, William Marchal
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