Jawabanmu

Jawaban paling cerdas!
2014-04-12T18:42:29+07:00
X = Σmx / Σm = (70 x 0 + 30 x 100) / (70+30) = 300/100 = 3 skalajarak
8 3 8
2014-04-12T23:28:56+07:00
X = Σm = ( 70 + 30 ) = 300 : 100 = 3
5 3 5