dua buah dadu di lempar undi sebanyak satu kali peluang muncul jumlah mata dady 7 atau 10 Adalah

n(S) = 36

n(A) = {(1 6), (2 5), (3 4), (4 3), (5 2), (6 1)} =6

n(B) = {(4 6), ( 5 5), (6 4)} = 3

P =[ n(A) +n(B)]/ n(S)

= (6+3)/36

= 9/36

= 1/4