Cheryl wants to find the number of hours seventh-graders do homework each week. There are 297 girls and boys in
seventh grade. Which is the best way for Cheryl to get a representative sample without spending too much time?
She can survey 15 of her friends in the school.
She can survey every sixth-grade student in the school.
She can randomly survey 50 girls in the entire school.
She can randomly survey 50 seventh-graders in the school.

She can randomly survey 50 seventh-graders in the school.

Step-by-step explanation: To get the best result without wasting to much time means she cannot afford to survey every student. To receive the best results it should be unbiased so random is the way to go. Randomly surveying 50 girls in her school does not guarantee that those girls are all seventh graders so the best answer is She can randomly survey 50 seventh-graders in the school.