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thn 2013 naik sebesar 16 -8 = 8 ton
39.
jumlah dua dadu ganjil
kemungkinan 1 = ganjil , genap = (3/6 x 3/5) = 3/10
kemungkinan 2 = genap, ganjil = (3/6 x 3/5) = 3/10
Peluang total = 3/10 + 3/10 = 6/10 = 3/5
40.
banyak kemungkinan dari 3 anak = 2^3 = 8
paling sedikit 1 anak laki laki = 1 - P(3p) = 1 - 1/8 = 7/8