Science Bowl Question

📅 NSB 2011 Set 4🎓 HS🔄 Round 12#️⃣ Question 4❓ Toss-Up📝 Multiple Choice

A student at your school conducts a survey about hair products. He determines the hair color of 50 of his classmates, and then randomly selects 5 redheads and 5 brunettes to participate in his survey. What type of sampling did he use?

W) Simple random
X) Stratified random
Y) Cluster
Z) Systematic
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