Find the mean number of letters

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Reference no: EM131533374

The United States Postal Service reports 93 percent of first-class mail within the same city delivered within two days of the time of mailing. Six letters are randomly sent to different locations.

A. What is the probability that all six arrive within two days?

B. Find the mean number of letters that will arrive within two days.

Reference no: EM131533374

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