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40+48+70+32= 190selisih = 10
5.) 250+100+250 = 600
6.) 90/120 x 60 = 45
7.) 20/100 x 300 = 60
8.) 70+60+80+70+50+40 = 370:7 = 53
Jumlah siswa = 4 + 10 + 8 + 8
= 30
Total nilai = 4x5 + 10x6 + 8x7 + 8x8
= 20 + 60 + 56 + 64
= 200
Nilai rata-rata = 200 : 30 = 6,67
Kelas B
Jumlah siswa = 8 + 8 + 10 + 4
= 30
Total nilai = 8x5 + 8x6 + 10x7 + 4x8
= 40 + 48 + 70 + 32
= 190
Nilai rata-rata = 190 : 30 = 6,33
Selisih Nilai rata-rata = 6,67-6,33
= 0,34
5. Total produksi 3 tahun terakhir
= 250 + 100 + 250
= 600 kuintal
8. (70+60+80+70+50+40) : 6
= 370 : 6
= 61,7
6. 45 siswa
7. 60