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Dit. Rata - rata(?)
Jawab....
Rata-rata : banyaknya data/banyaknya anak
Cari terlebih dahulu datanya...
@ 6 × 2 = 12
@ 7 × 8 = 56
@ 8 × 6 = 48
@ 9 × 4 = 36
@ 10 × 2 = 20
Maka :
12 + 56 + 48 + 36 + 20 /22
@ 172/22
@ 7,81