Stuck on this stat problem

bree102385

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Nov 15, 2010
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5
Round answers to 4 decimal places and show all work.


During the period of time that a local university takes phone-in registrations, calls come in at the rate of one every two minutes.

1. What is the expected number of calls in one hour?

2. What is the probability of no calls in a five-minute period?
 


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