A university has 500 phones installed, each having an external call 1% of time. It is required that
Question: A university has 500 phones installed, each having an external call 1% of time. It is required that an external call can get through at least 95% of time. Assuming that whether these phones have external calls are independently of one another, at least how many external lines are needed for the university?
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Type of Deliverable: Word Document
Type of Deliverable: Word Document
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