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Peluang kelereng biru=20/30=2/3
peluang kelereng kuning=10/30=1/3
klereng biru 20 bh
kmlah kelereng kuning = 30-20= 10 kelereng.
a) peluang terambil kelereng biru; 20/30= 2/3
b) kelereng merah: 10/30 = 1/3