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Verified answer
Kelas 9 MatematikaBab Statistika
Semua siswa = s
Siswa pria = a
Siswa wanita = b
(n(a) - n(b)) . a = (n(s) - n(b)) . s
(85 - 90) . a = (88 - 90) . 30
(-5) . a = (-2) . 30
a = (-2) . 30 / (-5)
a = 12 siswa