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we can get 5 in 4 diff. ways: (2,3) (3,2) (1,4) (4,1)

similarly 8 in 5 diff ways: (3,5) (5,3) (4,4) (6,2) (2,6)

now neglecting all other outcomes we are concerned with getting either 5 or 8 right?

so P(5 before 8) =4/(4+5) = 4/9

similarly P(8 before 5)=5/9
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