Probability-united states postal service

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Reference no: EM13100791

The United States Postal Service reports that 95 percent of first class mail within the same city is delivered within two days of the time of mailing. Six of the letters are randomly sent to different locations.

What is the probability that all six arrive within two days

What is the probability that exactly five arrive within two days

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

Compute the variance and standard deviation of the number that will arrive within two days.

Reference no: EM13100791

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