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Bab StatistikaMatematika SMA Kelas IX
titik tengah = xi dan fi = frekuensi
xi | fi | fi . xi
7 | 2 | 14
12 | 3 | 36
17 | 5 | 85
22 | 3 | 66
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13 | 201
rata-rata = 201/13
rata-rata = 15,46
jawabannya E