Jangan lupa caranya kak;v

Bab Peluang
Matematika SMP Kelas IX

39] 2 dadu, ruang sampel = 6² = 36
2 dadu berjumlah kurang dari 5
= (1,1), (1,2), (2,1), (2,2), (3,1), (1,3) → ada 6

peluangnya = 6/36 = 1/6

◎◎ A ◎◎

40] jumlah kelereng = 30 + 18 + 32 = 80 kelereng
jumlah kelereng merah = 32
peluang = 32/80 = 2/5 = 0,40

◎◎ B ◎◎

39.)n(s)=36
n(<5)=(1,1)(1,2)(1,3)(2,1)(2,2)(3,1)=6
P(<5)=6/36=1/6
40)n(s)=80
Pth=30,Br=18,Mrh=32
P(Mrh)=32/80=2/5=0,40