Question

Dua buah dadu dilempar bersama-sama. Berapa peluang munculnya mata dadu:
a. Berjumlah 3
b. Berjumlah 5
c. Berjumlah 8
d. Berjumlah kurang dri 6
e. Berjumlah kurang dari 9

Answer 1

N(s)=36
a. n(a)=2 {(1,2),(2,1)}
p(brjmlh 3)=n(a)/n(s)=2/36=1/18

b. n(b)=4 {(1,4),(4,1),(2,3),(3,2)}
p(brjmlh 5)=n(b)/n(s)=4/36=1/9

c. n(c)=5 {(2,6),(6,2),(3,5),(5,3),(4,4)}
p(brjmlh 8)=n(c)/n(s)=5/36

d. n(d)=8 {(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,3),(4,1)}
p(brjmlh krng dri 6)=n(d)/n(s)=8/36=4/9

e. n(e)=26 {(1,1),(1,2)(2,1),(1,3),(3,1),(1,4),(4,1),(1,5),(5,1),(1,6),(6,1),(2,2),(2,3),(3,2),(2,4),(4,2),(2,5),(5,2),(2,6),(6,2),(3,3),(3,4),(4,3),(3,5),(5,3),(4,4)}
p(brjmlh krng dri 9)=n(e)/n(s)=26/36=13/18

Answer 2

N(s)=36
a. n(a)=2 {(1,2),(2,1)}
p(brjmlh 3)=n(a)/n(s)=2/36=1/18

b. n(b)=4 {(1,4),(4,1),(2,3),(3,2)}
p(brjmlh 5)=n(b)/n(s)=4/36=1/9

c. n(c)=5 {(2,6),(6,2),(3,5),(5,3),(4,4)}
p(brjmlh 8)=n(c)/n(s)=5/36

d. n(d)=8 {(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,3),(4,1)}
p(brjmlh krng dri 6)=n(d)/n(s)=8/36=4/9

e. n(e)=26 {(1,1),(1,2)(2,1),(1,3),(3,1),(1,4),(4,1),(1,5),(5,1),(1,6),(6,1),(2,2),(2,3),(3,2),(2,4),(4,2),(2,5),(5,2),(2,6),(6,2),(3,3),(3,4),(4,3),(3,5),(5,3),(4,4)}
p(brjmlh krng dri 9)=n(e)/n(s)=26/36=13/18