Question: The U S Postal Service reports 95 of first class mail within

The U.S. Postal Service reports 95% of first-class mail within the same city is delivered within 2 days of the time of mailing. Six letters are randomly sent to different locations.
a. What is the probability that all six arrive within 2 days?
b. What is the probability that exactly five arrive within 2 days?
c. Find the mean number of letters that will arrive within 2 days.
d. Compute the variance and standard deviation of the number that will arrive within 2 days.

View Solution:

Sale on SolutionInn
  • CreatedDecember 10, 2014
  • Files Included
Post your question