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b . What is the probability that a randomly selected monthly cell phone bill is between $ 60 and $ 83 ? c . What is the probability that a randomly selected monthly cell phone bill is between $ 80 and $ 90 ? d . What is the probability that a randomly selected monthly cell phone bill is no more than $ 55 ?
Question 3
A Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip . 19 % responded that it was for an internal company visit . Suppose 950 business travelers are randomly selected .
a . What is the probability that more than 25 % of the business travelers say that the reason for their most recent business trip was an internal company visit ?
b . What is the probability that between 15 % and 20 % of the business travelers say that the reason for their most recent business trip was an internal company visit ?
c . What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit ?
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