3.The ratio of blue chairs to red chairs in Mrs. Taylor’s class is 4 to 5. Which of the following cannot represent the total number of chairs in Ms. Taylor's class?. Single choice. A 18
B 27
C 30
D 36

Dr. williams conducted a survey in the mall, measuring the shopping habits of people ages 15, 25, 35, 45, and 55, with 10 people in each group. which of the following best describes her study? an experiment a cross-sectional study a case study a longitudinal study a double-blind study