Soal SMA · Soal cerita · Kesulitan 3/5
A researcher surveyed 120 students about their preferred study method. 70 students prefer group study, 50 prefer individual study, and 30 prefer both. How many students prefer neither group nor individual study?
- A.10
- B.20
- C.30
- D.40
Kunci jawaban & pembahasan
Jawaban: 30
By the inclusion-exclusion principle, students preferring at least one method = 70 + 50 - 30 = 90, so students preferring neither = 120 - 90 = 30.
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