Question 252145
a) P(5)=4/24=1/6 (1,4), (2,3), (3,2), (4,1) 
b) P(9)=2/24=1/12 (5,4), (6,3) + P(5) = 4/24
2/24 + 4/24 = 6/24 = 1/4
c) P(A n B) = 0 null set
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Ed