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- siswa = 62
20/X = 60/62
60X =1240
X = 1240/60
X = 20,666
bnyak siswa (m) = 20
nilai rata" siswa tambahan = 70
nilai rata " akhir = 62
banyak siswa tambahan(n) = ?
jadi banyaknya tambahan siswa adalah 5 orang