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Verified answer
Bilangan prima antara 1 sampai 20 adalahA = {2, 3, 5, 7, 11, 13, 17, 19 }
n(A) = 8
P(A) = n(A)/n(S)
= 8/20
= 2/5
8 bilangan :
2, 3, 5, 7, 11, 13, 17, 19
peluangnya jadinyaa
rumah bernomor prima/jumlah semua rumah
8/20 disederhanain jadi 2/5, jawabannya A