A consumer advocate claims that 80 percent of cable television subscribers are not satisfied with their cable service, and suppose that a random sample of 20 cable subscribers is selected. Let x be the number of cable television subscibers who are not satisfied with their cable service. Find the probability that
a. More than 15 subscribers are not satisfied with their service
b. 14 to 18 subscribers (inclusive) are not satisfied with their service
c. Find the mean and standard deviation of x

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so, what is your process?

are we to assume a normal distribution?

I'm not sure how to approach it exactly. I believe it would be something like P(15) = ?

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