Dua dadu bermata enam dilemparkan sekali secara bersamaan, peluang munculnya jumlah mata dadu yang kurang dari 11 adalah?

Pelambungan 2 buah dadu
S={(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)}
n(S)=36
A=peluang muncul jumlah mata dadu kurang dari 11
={(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)(6,1)(6,2)(6,3)(6,4)}
n(A)=33
P(A)=n(A)/n(S)
=33/36
=11/12

Semoga bisa membantu...