When Henry surveyed 45 seventh-grade students at random in the school cafeteria, he found that 3 out of 15 liked reggae music. Using proportional reasoning, about how many of the 180 seventh-grade students in his school like reggae?
Answer
A
About 36 seventh-grade students like reggae music.
B
About 108 seventh-grade students like reggae music.
C
About 60 seventh-grade students like reggae music.
D
About 12 seventh-grade students like reggae music.
Explanation
The survey suggests that 3 out of every 15 students like reggae, which simplifies to 1 out of 5. Apply that proportion to all 180 seventh-grade students: 180 ÷ 5 = 36. So about 36 students like reggae music, matching choice A.
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