1. Susan forgot to study for her economics quiz. She guessed on all five true/false questions. Does this situation represent a binomial experiment? A. Yes, because the questions are dependent and mutually inclusive. B. Yes, because the trials are selected at random. C. Yes, because the answer is right or wrong. D. Yes, because each trial has exactly two outcomes; the probability of each trial is ; there are five trials and these are independent. Hint 2. While watching a television quiz show, Lou guessed on the 10 true/false questions. What is the probability of his getting 6 questions correct and 4 questions wrong? A. 210 B. or about 0.205 C. or about 0.3048 D. or about 0.1770 Hint 3. An article in the Gazette reported that about 1 out of 4 cars sold in 1980 was red. Suppose a salesperson sells 6 cars per week. What is the probability that he or she sells at least 4 red cars in a week? A. or about 0.0330 B. or about 0.1318 C. or about 0.9624 D. or about 0.0376 Hint 4. How many ways are there to correctly answer 2 out of 7 true-or-false questions? A. 2520 B. 42 C. 2 D. 21 Hint 5. Suppose a family has 9 children. What is the probability that they have at least 5 boys? A. B. C. D. Hint