Customer Service 5 An important part of the customer service responsibilities of a telephone company relates to the speed with which troubles in residential service can be repaired. Suppose past data indicate that the likelihood is 0.7 in residential service can be repaired on the same day. For the rst ve troubles reported on a given day, what is the probability that a. all ve will be repaired on the same day? b. at least three will be repaired on the same day