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5 x 1 = 5
6 x 5 = 30
7 x 6 = 42
8 x X = 8x
9 x 3 = 27
10 x 1 = 10
Jumlah nilai = 114 + 8x
Jumlah Frekwensi (data) = 16 + x
Jumlah nilai : jumlah data = rata-rata
114 + 8x : (16 + x) = 7,3
114 + 8x = 7,3 (16 + x)
114 + 8x = 116,8 + 7,3x
8x-7,3x= 116,8-114
0.7x = 2,80
x =4
⇔
jadi, nilai x = 4