Nilai rata-rata
[tex] \frac{jumlah \: nilai}{banyak \: siswa} \\ \\ \frac{(5 \times 7.2) + (10 \times 7.5)}{(5 + 10)} \\ \\ \frac{(36 + 75)}{15} \\ \\ \frac{111}{15} \\ \\ 7,4[/tex]
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Nilai rata-rata
[tex] \frac{jumlah \: nilai}{banyak \: siswa} \\ \\ \frac{(5 \times 7.2) + (10 \times 7.5)}{(5 + 10)} \\ \\ \frac{(36 + 75)}{15} \\ \\ \frac{111}{15} \\ \\ 7,4[/tex]