Diketahui :
Berat badan 44 45 46 47 48 49 50
Frekuensi 4 3 6 6 2 p 4
Nilai rata-rata berat badan = 47
Ditanya : nilai p ?
Dijawab :
Total berat badan = (44x4) + (45x3) + (46x6) + (47x6) + (48x2) + (49xp) + (50x4) = 176 + 135 + 276 + 282 + 96 + 49p +200 = 1.165 + 49p
Total frekuensi = 4 + 3 + 6 + 6 + 2 + p + 4 = 25 + p
Rata-rata berat badan = Total berat badan : Total frekuensi
47 = (1.165 + 49p) / (25 + p)
47(25 + p) = 1.165 + 49p
1.175 + 47p = 1.165 + 49p
49p - 47p = 1.175 - 1.165
2p = 10
p = 5
Mapel: Matematika
Kelas: 7
Materi: Statistika
Kata Kunci: Nilai rata-rata
Kode soal: 2
Kode Kategorisasi : 7.2.9
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Verified answer
Semoga terbantu ;) ,,Diketahui :
Berat badan 44 45 46 47 48 49 50
Frekuensi 4 3 6 6 2 p 4
Nilai rata-rata berat badan = 47
Ditanya : nilai p ?
Dijawab :
Total berat badan = (44x4) + (45x3) + (46x6) + (47x6) + (48x2) + (49xp) + (50x4) = 176 + 135 + 276 + 282 + 96 + 49p +200 = 1.165 + 49p
Total frekuensi = 4 + 3 + 6 + 6 + 2 + p + 4 = 25 + p
Rata-rata berat badan = Total berat badan : Total frekuensi
47 = (1.165 + 49p) / (25 + p)
47(25 + p) = 1.165 + 49p
1.175 + 47p = 1.165 + 49p
49p - 47p = 1.175 - 1.165
2p = 10
p = 5
Mapel: Matematika
Kelas: 7
Materi: Statistika
Kata Kunci: Nilai rata-rata
Kode soal: 2
Kode Kategorisasi : 7.2.9