Mean = jumlah data/banyak data
[tex] \: [/tex]
= (60 × 7) + (70 × 8) + (80 × 10) + (90 × 3) + (100 × 2)/(7 + 8 + 10 + 3 + 2)
= 420 + 560 + 800 + 270 + 200/30
= 2250/30
= 75
- opsi b
JAWABAN
=================
Mean = Rata - rata
=================
Penyelesaian :
» Rata - rata «
[tex] \sf = \frac{jumlah \: data}{banyaknya \:data } [/tex]
[tex] \sf = \frac{(60 \times 7) + (70 \times 8) + (80 \times 10) + (90 \times 3) + (100 \times 2)}{7+8+10+3+2} [/tex]
[tex] \sf = \frac{420 + 560 + 800 + 270 + 200}{7+8+10+3+2} [/tex]
[tex] \sf = \frac{2.250}{7+8+10+3+2} [/tex]
[tex] \sf = \frac{2.250}{30} [/tex]
[tex] \sf = 75 \: (b)[/tex]
Kesimpulan :
- Jadi, mean nilai ulangan di atas adalah 75
I Hope This Help-!
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