October 2018 1 27 Report
Sekelompok siswa mempunyai nilai rata-rata 75,0. jika digabungkan dengan 7 siswa yang mempunyai nilai rata-rata 78,0 nilai rata-ratanya menjadi 76,4, banyak siswa mula mula adalah...
A.8 orang
B.7 orang
C. 6 orang
D. 5orang
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