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TNI dan polisi = 60°/360° × 300 = 50 orang (B)
39. rata-rata = [(5×9)+(6×11)+(7×10)+(8×5)+(9×2)+(10×3)]/(9+11+10+5+2+3)
= (45+66+70+40+18+30)/40
= 269/40 = 6,725
siswa yang di atas rata-rata = 10+5+2+3 = 20 anak (A)
40. Modus = yang paling banyak = 21 tahun (A)