31. Diketahui:
Kantong 1:
merah = 3
putih = 5
Kantong 2:
merah = 6
Hitam = 2
A= kelereng putih dari kantong 1
B= kelereng hitam dari kantong 2
Ditanyakan:
P(AnB)
Jawab:
P(AnB) = P(A) . P(B)
= n(A)/n(S) . n(B)/n(S)
= 5/(5+3). 2/(2+6)
= 5/8. 2/8
= 5/8. 1/4
= 5/32
32. Diketahui:
Kotak 1:
merah = 5
putih = 3
Kotak 2:
merah = 4
Hitam = 6
Kotak 3:
Biru = 5
Merah = 6
A = dua bola merah
P(A)
P(A) = 1/3. 5/(3+5). 4/(6+4). 6/(5+6)
= 1/3. 5/8. 4/10. 6/11
= 6/3. 5/10. 4/8. 1/11
= 2. 1/2. 1/2. 1/11
= 1/2. 1/11
= 1/22
Mapel: Matematika
Kelas: 12
Materi: Peluang
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31. Diketahui:
Kantong 1:
merah = 3
putih = 5
Kantong 2:
merah = 6
Hitam = 2
A= kelereng putih dari kantong 1
B= kelereng hitam dari kantong 2
Ditanyakan:
P(AnB)
Jawab:
P(AnB) = P(A) . P(B)
= n(A)/n(S) . n(B)/n(S)
= 5/(5+3). 2/(2+6)
= 5/8. 2/8
= 5/8. 1/4
= 5/32
32. Diketahui:
Kotak 1:
merah = 5
putih = 3
Kotak 2:
merah = 4
Hitam = 6
Kotak 3:
Biru = 5
Merah = 6
A = dua bola merah
Ditanyakan:
P(A)
Jawab:
P(A) = 1/3. 5/(3+5). 4/(6+4). 6/(5+6)
= 1/3. 5/8. 4/10. 6/11
= 6/3. 5/10. 4/8. 1/11
= 2. 1/2. 1/2. 1/11
= 1/2. 1/11
= 1/22
Mapel: Matematika
Kelas: 12
Materi: Peluang