Dua dadu dilambungkan bersamaan 120 kali. Frekuensi harapan munculnya mata dadu berjumlah 4 atau 7 adalah...

4 banding 7 atau 120¿

Ruang sampel 2 mata dadu = 6² = 36
(1,1) (1,2) (1,3) (1,4) (1,5) (1,6)
(2,1) (2,2) (2,3) (2,4) (2,5) (2,6)
(3,1) (3,2) (3,3) (3,4) (3,5) (3,6)
(4,1) (4,2) (4,3) (4,4) (4,5) (4,6)
(5,1) (5,2) (5,3) (5,4) (5,5) (5,6)
(6,1) (6,2) (6,3) (6,4) (6,5) (6,6)
Mata dadu berjumlah 4 =
(1,3), (2,2), (3,1) => 3
Mata dadu berjumlah 7 =
(1,6), (2,5), (3,4), (4,3), (5,2) (6,1) => 6
P (A) = 3 + 6 = 9 / 36
n = 120
F (A) = n x P (A)
= 120 x 9/36
= 120 x 1/4
= 30

Semoga membantu :)