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peluang bilangan ganjil : 1/2
peluang bilangan prima : 2/5
latihan 10
bola merah dari kotak I : 4/7
bola hitam dari kotak II : 2/9
n(S) = 20
Mencari peluang (A) :
A = Kartu bernomor ganjil => 1,3,5,7,9,11,13,15,17,19 n(A) = 10
P(A) = 10/20
Mencari peluang (B)
B = Kartu bernomor prima => 2,3,5,7,11,13,17,19 n(B) = 8
P(B) = 8/20
AnB = 3,5,7,11,13,17,19 n(AnB) = 7
P(AnB) = 7/20
P(AuB) = P(A) + P(B) - P(AnB) = 10/20+8/20-7/20 = 11/20
No. 10 yg 2a
P(A) Peluang bola merah dari kotak I = 4/7
P(B) Peluang bola hitam dari kotak II = 2/9
P(AnB) = P(A) X P(B) = 4/7X2/9 = 8/63
Good Luck! :D