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f = frekuensi
mean = x / f
4,33 = (5+4+5+3+4+4+p+6+2+3+3) / 11
4,33 = (39 + p) / 11
39 + p = 47,63
p = 47,63 - 39
p = 8,63
rasanya seperti ini...
38 +m per 11 = 4,33
38 + m = 4,33 dikali 11
38+ m = 47,63
m = 47,63 - 38
m =9,63
kalau dihitung
5+4+5+3+4+4+9,63+6+2+3+2 per 11= ....
47,63 per 11 = ...
= 4,33
jadi jawabannya benar 9,63