Victoria selects a card at random from a box of blank greeting cards. The box has 5 "Happy Birthday" cards, eleven "Thank You" cards, and 4 "Get Well Soon" cards. What is the probability that she selects a "Happy Birthday" or "Get Well Soon" card?
nine percent
forty-five percent
sixty-six percent
eighty-nine percent
Which of the following sampling methods includes samples obtained by a fixed pattern?
systematic sampling
representative sampling
volunteer sampling
simple random sampling