Maria wants to determine which student is favored for president of the student council. Which of the following samples are biased and not random? Select all that apply. 1. Surveying the boys in the freshman class. 2. Surveying every other student in the cafeteria. 3. Surveying all the students in her math class. 4. Surveying 20 students from each grade at random. 5. Surveying the students in the chess club.
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