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= 7,6 × 24
= 182,4
Laki-laki = Rata-rata × Jumlah siswa
= 8,1 × 6
= 48,6
Rata-rata = Jumlah nilai : Jumlah siswa
= (182,4 + 48,6) : (24 + 6)
= 231 : 30
= 7,7
--------------------------------=
24+6
182,4 + 48,6 231
--------------------= --------
30 3
= 7,7