Jawab:
17.Jumlah Rata-rata 4 siswa
= 4 × 6,9
= 27,6
Jumlah rata-rata 4 siwa + 1 siswa
= 5 ×7,2
= 36
Rata-rata siswa yang bergabung
= 36 - 27,6
= 8,4(C)
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Jawab:
17.Jumlah Rata-rata 4 siswa
= 4 × 6,9
= 27,6
Jumlah rata-rata 4 siwa + 1 siswa
= 5 ×7,2
= 36
Rata-rata siswa yang bergabung
= 36 - 27,6
= 8,4(C)