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Question
The Post Office has established a record in a major midwestern city for delivering 90 percent of its local mail the next working day. When there are 8 local letters mailed, what is the probability that the number delivered will be within 2 standard deviations of the mean?A. .9950
B. .9619
C. .8131
D. .9996
Answer
This answer is hidden. It contains 102 characters.
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