Question

167. HaNYA BAGI YG JENIUS MATEMATIKA. PAKAI CARA LENGKAP

Answer 1

9.)
Rata2
= [ (5 x 4) + (6 x 5) + (7 x 9) + (8 x 6) + (9 x 10) + (10 x 6) ] / [4 + 5 + 9 + 6 + 10 + 6]
= [20 + 30 + 63 + 48 + 90 + 60] / 40
= 311 / 40
= 7,775

10.)
Jumlah Seluruhnya
= 360°/(360 - 135 - 108 - 45)° x 8
= 360°/72° x 8
= 30 siswa