Tolong bantu ya.. Pakai carannya.. Makasih

1. 5 × 6 = 30
6 × 8 = 48
7 × 5 = 35
8 × 16 = 128
9 × 5 = 45
= 30+48+35+128+45 = 286

Banyak Siswa = 6+8+5+16+5 = 40

Rata-rata = 286 : 40 = 7,15
Jawaban = B. 7,15

2. C. 21