dua nilai ulangan ridwan adalah 7 dan 8 .berapa nilai ulangan ridwan yang ketiga jika diketahui nilai rata rata ketiga ulangannya adalah 7

Oleh: USER2624
26 Agustus 2025 matematika 5 menit baca
4.5
138 views 138 komentar 10 shares
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Pertanyaan

Grade: Education Mata Pelajaran: matematika
dua nilai ulangan ridwan adalah 7 dan 8 .berapa nilai ulangan ridwan yang ketiga jika diketahui nilai rata rata ketiga ulangannya adalah 7
Ditanyakan oleh:
138 Dilihat 138 Jawaban
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Jawaban (138)

Jawaban Terbaik
(70)
x rata2=∑nilai÷n
7=(7+8+x)÷3
7×3= 15+x
x=21-15
x=6
Dijawab pada tanggal 26 Agustus 2025
(270)
dik nilai rata2 = 7
nilai ulangan ridwan = 7,8, dan y

py nilai rata2 = jumlah nilai/banyak nilai
7 = 7+8+y /3
7×3 = 15 + y
21 =15 +y
21-15 =y
y=6
jadi nilai yg letiga adalah 6
Dijawab pada tanggal 26 Agustus 2025

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