A certain university's Wide Area Telephone Service (WATS) line can handle as many as 31 calls per minute. The average number of calls per minute during peak periods is 22 with a standard deviation of 3 calls. What percentage of the time will the WATS line be overloaded during peak periods? (Assume that the numbers of phone calls are normally distributed during the peak period.) %

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A: Answer Option c = 68.2% is correct

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