What is the probability that two of the four don't have air conditioning?

A prospective consumer who has never been sought before by a direct marketer can be classified as a _____

a. nonregular b. nonrespondent c. new trial d. new contact

Which of the following is not an example of a recent vending machine-related innovation?

a. electronic cash-handling mechanisms b. microprocessors that track consumer preferences and trace malfunctions c. voice synthesizers d. theft-resistant vending machines