Rata-rata berat badan siswa
[tex] \frac{jumlah \: data}{banyak \: data} \\ \\ \frac{(25 \times 48 + 15 \times 60)}{25 + 15} \\ \\ \frac{1.200 + 900}{40} \\ \\ \frac{2.100}{40} \\ \\ 52,5 \:kg \: (c)[/tex]
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Rata-rata berat badan siswa
[tex] \frac{jumlah \: data}{banyak \: data} \\ \\ \frac{(25 \times 48 + 15 \times 60)}{25 + 15} \\ \\ \frac{1.200 + 900}{40} \\ \\ \frac{2.100}{40} \\ \\ 52,5 \:kg \: (c)[/tex]