In: Statistics and Probability
The probability that a FEDEX delivery man meets someone at a random home to sign for a delivery that requires signature is 80%. If FEDEX delivery men call at 9 random homes to make such a delivery what is the probability that
(a) people are at home to sign in one or six homes
(b) people are at home to sign in exactly 8 homes
(c) People are at home to sign in more than 3 homes.