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Verified answer
Nilai rata2 9 anak = 7,8Nilai rata2 Nanda = 9
Nilai rata2 keseluruhan=?
(7,8 + 9) : 2 = 8,4.
Jadi, nilai rata2 10 siswa adalah 8,4
Mohon ma'af apabila keliru
rata2 nilai = 71,1