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Jawaban Terkonfirmasi
Diketahui :
nilai rata-rata 7kali ulangan = 8
nilai rata-rata 3kali ulangan = 9
Ditanya : nilai rata-rata 10kali ulangan ?
Dijawab :
Total nilai 7kali ulangan = 7×8 = 56
Total nilai 3kali ulangan = 3×9 = 27
Nilai rata-rata = (56+27) / 10 = 83/10 = 8,3
- X gab = ( x₁ × n₁ + x₂ × n₂ ) ÷ ( n₁ + n₂ ) = ( 8 × 7 + 9 × 3 ) ÷ ( 7 + 3 ) = 83 ÷ 10 = 8,3
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