When two dice are rolled, the sum can be any of the integers lying in the set [2, 12].
If the sum is odd, the universal set is : {3,3,5,5,5,5,7,7,7,7,7,7,9,9,9,9,11,11}
The probability of getting a 5 given that the sum is odd is 4/18 = 2/9
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