SOLUTION: Suppose the number of cell phones in a household has a binomial distribution with parameters n = 21 and p = 25%. Find the probability of a household having: (a) 16 or 20 cell

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Question 1192676: Suppose the number of cell phones in a household has a binomial distribution with parameters n = 21 and p = 25%.
Find the probability of a household having:
(a) 16 or 20 cell phones
(b) 18 or fewer cell phones
(c) 18 or more cell phones
(d) fewer than 20 cell phones
(e) more than 18 cell phones
Answer by ikleyn(52778) About Me  (Show Source):
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To see many other similar  (and different)  solved problems,  look into the lessons

    - Simple and simplest probability problems on Binomial distribution
    - Typical binomial distribution probability problems
    - How to calculate Binomial probabilities with Technology (using MS Excel)
    - Solving problems on Binomial distribution with Technology (using MS Excel)
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