Nilai rata-rata 8 siswa = 6,5
Nilai rata-rata 7 siswa
= (6,5(8)-10)/7
= (52-10)/7
= 42/7
= 6
Jadi nilai rata-rata 7 siswa = 6
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Nilai rata-rata 8 siswa = 6,5
Nilai rata-rata 7 siswa
= (6,5(8)-10)/7
= (52-10)/7
= 42/7
= 6
Jadi nilai rata-rata 7 siswa = 6