C. 17
50 = 4 siswa
60 = 6 siswa
70 = 7 siswa
80 = 6 siswa
90 = 4 Siswa
100 = 3 siswa
Rata rata
= jumlah data/banyak data
= 50+50+50+50+60+60+60+60+60+60+70+70+70+70+70+70+70+80+80+80+80+80+80+90+90+90+90+100+100+100/30
= 2190/30
= 73
Nilai rata rata = 73, berati nilai dibawah rata ratanya adalah 50, 60, 70
4 siswa + 6 siswa + 7 siswa = 17 siswa
ᤷ ៶ ៸
Detail jawaban
mapel : matematika
kelas : 5 dan 6
kategori : rata rata
#Ayobelajar
Jawaban:
rata-rata: (50+60+70+60+70+80+80+50+90+100+90+90+50+70+70+80+70+60+60+60+50+80+80+70+60+90+100+100+80+70) ÷ 30
= 21.900÷3
= 73 (nilai rata-rata)
anak yang nilainya dibawah rata-rata= c. 17
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C. 17
➥ penyelesaian soal
50 = 4 siswa
60 = 6 siswa
70 = 7 siswa
80 = 6 siswa
90 = 4 Siswa
100 = 3 siswa
Rata rata
= jumlah data/banyak data
= 50+50+50+50+60+60+60+60+60+60+70+70+70+70+70+70+70+80+80+80+80+80+80+90+90+90+90+100+100+100/30
= 2190/30
= 73
Nilai rata rata = 73, berati nilai dibawah rata ratanya adalah 50, 60, 70
4 siswa + 6 siswa + 7 siswa = 17 siswa
=============================>
ᤷ ៶ ៸
Detail jawaban
mapel : matematika
kelas : 5 dan 6
kategori : rata rata
#Ayobelajar
Jawaban:
rata-rata: (50+60+70+60+70+80+80+50+90+100+90+90+50+70+70+80+70+60+60+60+50+80+80+70+60+90+100+100+80+70) ÷ 30
= 21.900÷3
= 73 (nilai rata-rata)
anak yang nilainya dibawah rata-rata= c. 17