yg jago peluang mtk boleh masuk no 50

Bab Statistika dan Peluang

Banyak titik sampel dua bola n(S)
= 10C2
= 10!/2!(10 - 2)!
= (10 × 9 × 8!)/(2 × 1 × 8!)
= 5 × 9
= 45

Dua bola bernomor ganjil = A
A = {(1,3),(1,5),(1,7),(1,9),(3,5),(3,7),(3,9),((5,7),(5,9),(7,9}
n(A) = 10

P(A)
= n(A)/n(S)
= 10/45
= 2/9 (A)