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Verified answer
Bab StatistikaMatematika SMP Kelas VII
Semua siswa = s
Siswa putra = a
Siswa putri = b
(b - a) . n(b) = (s - a) . n(s)
(7,2 - 6,5) . 12 = (6,6 - 6,5) . n(s)
n (s) = 0,7 . 12 : 0,1
n(s) = 84 siswa
siswa putra = 84 - 12
= 72 siswa
siswa putra : siswa putri = 72 : 12
= 6 : 1