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.
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