Jawaban:
a. Rata-rata = (11 + 12 + 12 + 12 + 12 + 13 + 14) / 7
Rata-rata = 86/7
Rata-rata = 12,285
b. Rata-rata = (108 + 103 + 98 + 105 + 85 + 112 + 119 + 82 + 94 + 115 + 126) / 11
Rata-rata = 1147/11
Rata-rata = 104,27
c. Rata-rata = (40 + 50 + 55 + 60 + 8 + 37 + 50) / 7
Rata-rata = 300/7