(Langsung jawab)
a. Ada di gambar
b.
Total nilai 50 = nilai x jumlah anak = 50 x 4 = 200
Total nilai 60 = nilai x jumlah anak = 60 x 6 = 360
Total nilai 70 = 70 x 8 = 560
Total nilai 80 = 80 x 10 = 800
Total nilai 90 = 90 x 4 = 360
Total nilai 100 = 100 x 6 = 600
Total nilai = 200 + 360 + 560 + 800 + 360 + 600 = 2880
Total nilai / jumlah anak = 2880 / 38 = 75,78
Nilai rata-rata adalah 75,78.
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(Langsung jawab)
a. Ada di gambar
b.
Total nilai 50 = nilai x jumlah anak = 50 x 4 = 200
Total nilai 60 = nilai x jumlah anak = 60 x 6 = 360
Total nilai 70 = 70 x 8 = 560
Total nilai 80 = 80 x 10 = 800
Total nilai 90 = 90 x 4 = 360
Total nilai 100 = 100 x 6 = 600
Total nilai = 200 + 360 + 560 + 800 + 360 + 600 = 2880
Total nilai / jumlah anak = 2880 / 38 = 75,78
Nilai rata-rata adalah 75,78.