SOLUTION: 12. First class mail is delivered within two days 95% of the time. Six letters are randomly sent to different locations. a. What is the probability that all 6 arrive within 2 day

Question 393925: 12. First class mail is delivered within two days 95% of the time. Six letters are randomly sent to different locations.
a. What is the probability that all 6 arrive within 2 days?
b. What is the probability that exactly 5 arrive within 2 days?
c. What is the mean number of letters that will arrive within 2 days?

Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
a. , to three decimal places.
b. , to 4 decimal places.
c. letters
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