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basket = 360° - 90° - 160° - 40° = 70°
banyak siswa = 70°/360° × 216 = 42 orang (C)
6.
satai = 100% - 30% - 20% - 15% - 25% = 10%
banyak siswa yg gemar mie = x
15% / 10% = x / 20
10x = 300
= 30 orang (A)